January 31, 1913. THE COLLIERY GUARDIAN. 231 great in practical effect, the fundamental character of the tax, its type, remains the same. The system of imposing duties on the gross produce, and more especially in its particular form of application to the ton, either at a fixed rate, or varying by agree- ment according to the sale price, is essentially the method practised between private individuals when there is no question of works created by the public authorities, but consented to by them. This is parti- cularly the basis of our royalty system, as also in the case of the proportional subsoil duties in the Loire. A last form and a more special and exceptional one, is met with, particularly in new countries, when, for the sake of facility in collection, the tax is not collected at the mine, but on exportation from the country.* These export duties, so far as they are mineral taxes, may be either specific, as in New Caledonia, Chili, Algeria- Tunisia, or ad valorem as in Indo-China. The rates of each of the two types of proportional duties do not vary less among the various countries than do their forms ; and the differences between the latter may sometimes partially explain the variations of the former. Thus, as regards the gross produce, rates of taxation are to be found varying from J per cent, up to 20 and 30 per cent., these extreme figures naturally resulting only from special circumstances. As regards the net produce, setting aside exceptional forms, which aim rather at the sharing of extra profit, the tax varies from 2*5 per cent, to 10 or 12 per cent., and in the Belgian Katanga is as much as 33 per cent. —a quite exceptional amount. Moreover, in Rhodesia, the chartered company upon which the colony is dependent takes half the profits of the persons authorised to establish works there. In any consideration of the enormous differences in the rates of these duties, especially on the gross produce, it must be remembered that the higher figures refer generally to deposits from which the net produce is large in proportion to the gross produce, which illustrates the well-known economic influence of “ natural condi- tions ” on mineral deposits. It is particularly interesting to enquire whether there is any connection, and if so, what, between the rates of one and the other of these two types of proportional duties. To what does a certain percentage of the gross produce correspond on the net produce, or inversely ? This question must perforce lead to the recognition of one of the most salient features of the mining industry, which is distinct in a way, and which merits attention. In all other industries which are not monopolised in deed or by law, in which competition is free and open, there is established in each of them, owing to the fact of such competition, for a time, a certain average relation between the net produce and the gross prodce, the value of which will depend more particularly on the capital required to be sunk in order to obtain a definite gross produce, in quantity if not in value. It is quite different in regard to mines, where the proportion between the gross produce and the net produce is, within certain limits, capable of amounting to something comparatively enormous. This proportion between the two may, as a matter of fact, in some measure serve to characterise each mine from the economical and financial point of view. It is necessary, no doubt, in considering these differences of proportion, to ascribe some effect to the different financial policies of the companies, to their method of distribution and their use of the gross profit. The influence of “ natural conditions ” remains never- theless predominant and of considerable importance. Competency of management may, no doubt, beneficially influence the net cost, as errors of management may diminish, for a time, the effects of natural conditions and even compel a suspension of dividend for some time. These are vexations which, however, pass away with time. The effect of the natural conditions alone remains. Again, it should be borne in mind that the propor- tion between the net produce and the gross produce must have theoretically a tendency to increase with time in consequence of the theoretical increase in value of mineral substances in the future consequent on their exhaustion, if, as would probably be the case, this enhancement in sale prices is not compensated by a corresponding rise in the net cost. The “ privileged mines would become more privileged. This economic phenomenon of the “ natural con- ditions ” of mines, whose consideration is so full of interest, ensures to certain mines at the present day, and, in a theoretical sense, perhaps to all mines in the future, an extra profit or a super-profit. This recalls to ene’s mind the “ ground tax ” of Ricardo. Although his * As in the case of the nitrates in Chili, the phosphates in Algeria and Tunisia, the various mineral substances in Indo-China. theory has been strongly criticised, it had something equitable about it; the same idea recurs to-day in another form when reference is made to “privileged sites.” It may be easily seen that a system of taxation might be applied to mines, with particular reference to their “ natural conditions,” similar to that under which taxes on surplus values of real estate are levied in this country and Germany, and already proposed in France. Should the State desire to obtain increased financial returns from its mines, one apparently simple mode of doing this is to increase the rating assessment of the mining taxes, as was done in France in 1910. On the other hand, the mining industry would not be likely to tolerate, more than any other industry, certain added burdens in taxes, and there might possibly be the fear that, with an industry possessing really a monopoly, the exploiting companies, being strong enough to resist the tax, might pass the new charge on to the consumers, which probably has been the case more than once. The position is quite different in the case of a tax established in such a manner that it touches only the super-profit referred to above. In all probability the tax would remain in such a case on the owner of the “ privileged ” mine, as generally such a producer has no interest in raising the sale prices, which theoretically depend rather on producers placed in ordinary circum- stances. It would be rather to the producer’s interest to lower his sale prices in order to further extend the field of his supplies. This principle has been applied—so far as the author is aware—only in South Africa, and even there only on a moderate scale, under the Taxation Act of 1910. The eventual necessity of keeping in view the question of sinking funds—which will be obvious to everyone—has been applied here, although it appears to entail very serious difficulties. The same idea, in another form, inspired the scheme of the Bill brought forward in the Belgian Parliament in 1905, which, however, came to no result. In this case the mines were differentiated according to the value of the specific net profit per ton—a principle which could only be adopted in a country that has collieries only. The Belgian Bill only sought to impose this supple- mentary tax on future mines, which would not be a rational basis for any tax. The same principle in a third form is also found in the “ supplementary tax ” of the Mines Bill of Messrs. Barthou and Millerand and the Budget of 1910 of M. Cochery; but the scheme came to no more result in France than in Belgium. In this case, however, the differentiation of the mines was arrived at by taking the proportion of the net product to the amount of capital sunk in the undertaking. But, in contra- distinction to the Belgian scheme, this tax was to have been applied simultaneously to all the mines, on those already instituted as well as on those to be opened up. The increment tax of the Finance Act of 1910, in this country, emanates from the same fundamental idea, but it is of a different nature and has a different end in view. It is directed to the property of the mine, taken by itself, as landed estate, and not to its exploitation as a commercial undertaking. Local or Communal] Taxes. So far only those duties and taxes collected by the State for its own direct benefit have been considered; but in several countries the mines are subject to special taxes in favour of the different members of the State, such as its provinces, communes, &c. These local taxes constitute in certain countries, with reference to Prussia especially, really formidable charges when considered in relation to the State charges. They have, moreover, the vexatious peculiarity—whose incon- venience increases with their burden—that they may vary to a considerable extent in one district, or between one locality and another. When these local taxes are the result of the application of general industrial taxes, the blame can only be laid upon the burden of genera} taxation. But the same regime, in view of the peculiar character of the mining industry, may lead, as in Russia, for example, to a considerable surcharge on the mining industry in comparison with other industries. Compulsory Insurance. In addition to the real taxes in favour of the State or its members, there exist in various countries obligatory insurances in favour of the miners, which may be of a special nature, if not as to the kind of insurance, at least as to the rate ; the result of this is that there are prior deductions to be made by the mining undertakings which, owing to their being obligatory, resemble a tax the returns from which are applied in one special direction only. This is the case especially in Belgium and France. Although the effect of such deductions in Prussia and the other German States is to place a very heavy burden upon the mining industry—and a similar scheme of compulsory insurance has now been introduced into this country—no special remarks are made with regard to them here, owing to the fact that they are not really charges peculiar to the mining industry in such countries, but are rather general charges on the industries of these States. Final Remarks. The work involved in a minute study of the taxation of any one country is so great that a comparative study of the taxation of various countries can only be of a general and superficial character. The literature on this subject is extremely meagre, and the author, after consulting the Report of the Royal Commission on Mining Royalties, the papers in the Transactions of the Institution of Mining Engineers, by A. Hassam,* G. Humphreys-Davies,t and E. J. Castle, Q.C.,£ was obliged to communicate, in the majority of cases, with the various governments, through the usual channels. The paper concludes with a statement as to the taxation in the various countries considered, arranged according to the alphabetical order of the countries. * Trans. Inet.M.E., vol. xxix., page 90 et seq. t Trans. Inst.M.E., vol. iii., page 773 et seq. j Trans. Inst.M.E., vol. vii., page 428 et seq. NORTH STAFFORDSHIRE INSTITUTE OF MINING AND MECHANICAL ENGINEERS. A general meeting of the members of this institute was held at the North Stafford Hotel, Stoke-on-Trent, on Monday evening, Mr. Hugh Johnstone (president) in the chair. Mr. R. C. Wain, Whitfield Colliery, Stoke-on-Trent, was elected a student member. Electricity for Colliery Managers. A paper was read by Mr. R. Nelson, H.M. Electrical Inspector of Mines on “ Electricity: a Short Paper addressed to Colliery Managers.” Mr. Nelson said the suggestion he had to make as the primary object of his paper was that those colliery managers who experience difficulty in dealing with electrical matters should be content, at any rate to begin with, to know that if certain things are done with electrical apparatus certain results will follow, without being too curious to know what happens, according to the theorists, inside the apparatus. He would advise any manager to leave those things which involve what may appear to be complex points of theory until he has a firm grasp of what is meant by certain terms which the writer subsequently defined, and until he is able to weigh in his mind the meaning of other expressions in common use, such as “high” and “low” pressure, “high” insulation and “ low ” insulation, “ insulation resistance,” &c. It might also be useful to be familiar with the conditions which must be fulfilled before an electric shock can be received. The author then gave the following defini- tions :— 1. A good conductor offers very little resistance to the flow of electricity. A bad conductor offers a great deal of resistance. 2. A good insulator stops the flow of electricity just as effectively as a blank flange stops the flow of steam in a steam pipe. A bad insulator is less effective. 3. A “live" conductor is a conductor charged with electricity. Such a conductor requires to be surrounded by some insulating material. 4. A “ system " of conductors consists of two or more conductors maintained at different pressures by some source of electromotive force—a dynamo, or a battery of primary or secondary cells. A direct-current system has two such conductors. A three-phase alternating-current system has three. 5. “ Earthed” means effectively connected to the general mass of earth by means of a good conductor* For practical purposes the earth may be considered a conductor of negligible resistance, so large in volume that it is impossible to charge it above zero pressure with electricity. Electrical apparatus, for example a lamp or a motor, connected across the conductors of a system allows a current of electricity to flow through it, there being broadly speaking, a gradient of electrical pressure within the apparatus, that is to say in the conductors that go to form the apparatus, from one terminal to the other, or, if there be three terminals, from any one terminal to each of the other two. In flowing through the apparatus, the current is made to give, in the case of a lamp, light, in the case of a motor, mechanical power. Or it may be made merely to change its character; for example, a rotary converter changes alternating current into direct current and a transformer changes pressure; in both cases just as a reducing-valve changes steam pressure (that is to say, without any great loss of energy). In general, the electro- motive force is derived from mechanical power. The