JlXK 2*, 1895.] 



SCIENCE. 



717 



native and exotic, and of horticulturists' 

 varieties, are cultivated in the Garden and 

 Arboretum and the adjoining park, and the 

 native flora easily accessible from St. Louis 

 is large and varied. The herbarium, which 

 includes nearly 250,000 specimens, is fairly 

 representative of the vegetable life of 

 Europe and the United States, and also 

 contains a great many specimens from less 

 accessible regions. It is especially rich in 

 material illustrative of Cuscuta, Quercus, 

 Ooniferae, Yitis, Juncus, Agave, Yucca, 

 Sagittaria, Epilobium, Rumex. Rhamnacete 

 and other groups monographed by the late 

 Dr. Engelmann or by attaches of the 

 Garden. The herbarium is supplemented 

 by a large collection of woods, including 

 veneer transparencies and slides for the 

 microscope. The library, containing about 

 S,000 volumes and 10,000 pamphlets, in- 

 cludes most of the standard periodicals and 

 proceedings of learned bodies, a good col- 

 lection of morphological and physiological 

 works, nearly 500 carefully selected botan- 

 ical volumes published before the period 

 of Limueus, an unusually large number of 

 monographs of groups of cryptogams and 

 flowering plants, and the entire manuscript 

 notes and sketches representing the pains- 

 taking work of Engelmann. 



The great varietj- of living plants repre- 

 sented in the Garden, and the large lier- 

 barium, including the collections of Bern- 

 hardi and Engelmann, render the Garden 

 facilities exceptionally good for research in 

 systematic botany, in which direction the 

 library also is especially strong. The living 

 collections and library likewise aflbrd un- 

 usual opportunity for morphological, ana- 

 tomical and physiological studies, while the 

 plant house facilities for experimental work 

 are steadilj' increasing. The E. Lewis 

 Sturtevant Prelinnean library, in connection 

 with the opportunity aftbrded for the culti- 

 vation of vegetables and other useful plants, 

 is favorable also for the studv of cultivated 



plants and the modifications they have 

 undergone. 



These facilities are freely placed at the 

 disposal of professore of botany and other 

 persons competent to carry on research 

 work of value in botany or horticultiu-e, 

 subject only to such simple restrictions as 

 are necessary to protect the property of the 

 Garden from injury or loss. Persons who 

 wish to make use of them are invited to 

 correspond with the undei-signed. outlining 

 with as much detail as possible the work 

 they desire to do at the Garden, and giving 

 timely notice so that provision maj- be 

 made for the study of special subjects. 

 Those who have not published the results 

 of original work are requested to state their 

 preparation for the investigation they pro- 

 pose to undertake. 



Under the rules of Washington Univer- 

 sity, persons entitled to candidacy in that 

 institution for the Master's or Doctor's de- 

 gree may elect botanical research work as 

 a principal study for such degrees, if they 

 can devote the requisite time to resident 

 study. William Trelease, 



St. Louis, Mo. Direclor. 



SCIENTIFIC LITERATURE. 

 THE GEOLOGY OF THE SIERRA NEVADA. 



Geologic Atlas of the United States. V. S. 

 Geological Sui-sey; J. W. Powell, Di- 

 rector. Sacramento Folio, Geology by W. 

 LixDGREX. Placei-rille Folio, Geology by 

 W. LiNDGREX and H. AV. Turner. Jackson 

 Folio. Geolog}' by H. W. Tirner. Wash- 

 ington, D. C. 1S'.I4. 



These three sheets are the first installment 

 of a series covering the gold belt of Cali- 

 fornia which has been in course of prepara- 

 tion for several years by the oflicers of the 

 Geological Survey. It is needless to say 

 that they form a very important and wel- 

 come contribution to our knowledge of the 

 geology of California. Since the collapse 

 of the old State Survey under Whitney, 



