June 30, 1899.] 



SCIENCE. 



907 



and others will be iTad}^ for publication 

 during the coining autumn. 



During July and August, 1899, work will 

 be continued at Put-in-Bay. The party will 

 consist of the writer, as director ; Professor 

 H. B. Ward, of the University of Nebraska ; 

 Dr. H. S. Jennings, of Dartmouth College ; 

 Dr. Julia B. Snow, and Mr. R. H. Pond, 

 besides a number of assistants. The mem- 

 bers of the party will continue the work 

 undertaken last summer, and referred to in 

 Dr. Smith's notice, except that Mr. Pond, 

 who takes the place of Mr. Pieters, will 

 undertake an experimental investigation of 

 of the nutrition of the larger aquatic plants. 



The entire party will work at Put in-Bay 

 during July. During August it is intended 

 to divide the party. Those engaged in ex- 

 perimental work will remain at Put-iu- 

 Baj\ The writer and Professor Ward, to- 

 gether with a number of assistants, to act 

 as collectors, will make a tour of the lake 

 for the purpose of making collections, and 

 in order to study the distribution and con- 

 stitution of the plankton in the difl'erent 

 parts of the lake. 



The locality at Put-in-Bay affords a va- 

 riety of conditions and is rich in aquatic 

 fauna and flora. The occurrence of the 

 huge infusorian Bursaria truncatella and of 

 Trochospcera are of especial interest. 



During August it will be possible to offer 

 the facilities of the laboratory to a limited 

 number of investigators. The United States 

 Commission of Fish and Fisheries will fur- 

 nish all apparatus, glassware and reagents 

 and place the entire resources of the labora- 

 tory at the disposal of such investigators 

 without charge. Those who wish to take 

 advantage of this opportunity should com- 

 municate with the writer at Ann Arbor, 

 Michigan, before July 1st ; at Put in-Bay, 

 Ohio, after July 1st. 



Jacob Reighard. 



Zoological Laboeatoey of the University 

 OF Michigan, Ann Akbob, Mich. 



THE INTERNATIONAL CATALOGUE OF SCI- 

 ENTIFIC LITEEATOEE. 

 GEOLOGY' AND GEOGRAPHY. 



The schedule of classification of writings 

 relating to Geology and Geography which 

 it is proposed by the International Catalogue 

 Committee to adopt appears, on the whole, 

 to have been well considered, though, as re- 

 gards its details, it is evidently open to 

 certain criticisms. Thus it will be noted 

 that there is no recognition of any sub- 

 divisions of the Archajau. The matter of 

 soils, clearly of much importance, finds no 

 place in the list. It is hardly to be grouped 

 under the heading of Denudation and Dep- 

 osition. So, too, the matter of shore lines 

 appears to have fairly a share in a scheme 

 where glacial geology is ranked by itself 

 apart. It may also be remarked that the 

 whole field of economic geology is not sug- 

 gested by any of the headings, and surely 

 deserves recognition in any catalogue. Were 

 this heading adopted it would naturally in- 

 clude a large part of the papers concerning 

 veins and other ore deposits. As it is, 

 these phenomena appear not to have been 

 thought of. 



Under the heading of Geography is a 

 schedule of classification on a topographic 

 basis, which is probably intended to serve 

 also for the distribution of a portion at least 

 of the works on geology, though this is not 

 clearly stated. As a whole, the topograph- 

 ical classification which has been adopted 

 commends itself to the reader. In places, 

 however, the meaning is not clear, as in 

 ' K Arctic : Greenland and the area north 

 of the Arctic Circle, or all the coasts of Con- 

 tinental America, Asia and Europe, ivhioh- 

 ever is farther north' (the italics are ours). 

 It is possible, by systematic exegesis, to ar- 

 rive at some conception of what the writer 

 meant, but at first sight it seems to imply a 

 variable northnesa of these several areas. It 

 may also be noted that the category denoted 

 by ea., viz., Asiatic Russia, is much too 



