170 
it seems to me to pretty thoroughly cover 
the ground, and I do not see anything to 
find fault with. The only thing that oc- 
curs to me is the absence of titles covering 
chemical industries, but I presume they 
have been provided for in some other 
schedule. I refer, for example, to the fol- 
lowing topics among others : 
Sewer-gas petroleum 
mineral waters illuminating gas 
potable waters mortars 
water analysis cements 
sewage purification pigments 
water purification paints 
artificial illumination varnishes 
candles preservation of timber 
oils the different explosives 
lamps glass 
bleaching ceramics 
dyeing foods, all varieties 
calico-printing 
paper-making 
* preservation of food 
wines, beer, spirits 
glue ~ vinegar 
india rubber gutta percha 
fertilizers ete., ete. 
It may be that all this is provided for in 
some other part of your schedule. 
C. F. CHANDLER. 
H. GEOLOGY ; J. GEOGRAPHY. 
I wAve looked over the subjects of Geol- 
ogy, Geography and Paleontology, as re- 
quested, in the proposed International Cata- 
logue of the Royal Society. I feel only 
competent to speak of Geology authorita- 
tively, and in this I have endeavored to 
imagine myself in search of literature upon 
almost any imaginable geological subject. 
The scheme impresses me in general with 
being a satisfactory guide in this respect, 
with one important omission. In almost all 
the important mining countries, our own es- 
pecially, a great deal of attention is given 
to the study of what we call economic 
geology, or, as it is more often called 
abroad, applied or practical geology. I 
find no special topic that would cover 
this at all. Suppose I wished to find 
papers on Ore Deposits in general, or on 
SCIENCE. 
[N. S. Von. X. No. 241. 
Coal, or Building Stones, there is no topic 
under which these subjects would come, 
unless perchance it is G. Mineralogy, Gen- 
eral Mineralogy, 0600, Applications, which 
seems to me an improper place for them, 
because they are chiefly issued by Geolog- 
ical Surveys or in connection with them and 
are geologically treated. It seems to me 
that in addition to the heads under H. 
Geology, viz: General, Petrology, Phys- 
ical, Statigraphical, Maps, there should be 
Economics—with sub-heads—Ore Deposits 
in general, 
Then the metals in particular—Non-Me- 
tallic Substances : 
Coal Petroleum 
Building Stones Abrasives 
Salines Fertilizers 
Soils ete. 
I fancy that this sub-division of titles 
would be more often consulted than any 
other. 
Under Geography and Paleontology the 
classification seems to me to furnish a guide 
that will lead one to a desired goal, satis- 
factorily ; but I hesitate to speak positively. 
There is one other general point, and that 
is that the scheme should fall in, if possible, 
with plans already established, and I do 
not observe that it considers the Dewey 
system, now adopted in an extensive bibliog- 
raphy of the same kind in Geology in Bel- 
gium, and issued, I believe, by the Belgian 
Geological Survey. 
J. F. Kemp. 
K. PALEONTOLOGY ; L. ZOOLOGY. 
We have looked forward with great in- 
terest to the preliminary report of the In- 
ternational Catalogue Committee, which we 
understand is to be considered as a report 
of progress subject to future modification. 
It may seem somewhat unappreciative of 
the work that has been already done upon 
this report, but we must express our opinion 
very frankly that it is disappointing and 
