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Proceedings of the Royal Society. 
principles^ but is at least to a very great extent vouched for by the 
mode of construction (not only synthetic and deductive, but analytic 
and inductive throughout, and embodying the generalisation of 
long preliminary studies of economic detail) (see Classification of 
Statistics, p. 19). This difficulty can be best got over by reading 
these essays side by side with such a vast storehouse of facts as the 
well-known manual of Eoscher ; though the reader may be once 
more and finally reminded that he must not expect to find in these 
rough draughts for the ground plans of successive stories of the 
economic edifice, the completeness and detail, the colour and per- 
spective of the projected whole. (4) The suspicion of the prema- 
ture postulation of ethical considerations, if present, is due to the 
reader’s discovering more or less clearly for himself that ethics 
is not an isolated science, but a generalisation of the acts or 
practice corresponding to each of the orders of scientific considera- 
tions, physical and biological, &c., and that the ideals of maxi- 
mum production and maximum evolution respectively were as 
much the ethic of physical and biological considerations as that 
of sympathy is that of psychological ones. The fifth objection, 
due to discouragement from previous failures to find a synthesis, 
need not of course be argued with. 
But the real difficulty of the paper lies in its inevitable and 
extreme compression, and its consequently generalised form — the 
requisite application of the principles to the familiar details of 
economics, and their exposition in more literary form, being alike 
only suggested in an occasional sentence. The essential aim will, 
however, have been attained if it has been adequately demonstrated 
(1) to scientific specialists — physicists, biologists, or psychologists 
alike — that each respective aspect of economics lies fairly within 
their range, and (2) to professed economists, that such a mode of 
reinvestigation is not only practicable, but expedient. 
