64 THE MICROSCOPE. Apr. 



on the islands alone but on the main land and not only 

 in rainless districts but in other districts, as in Alaska. 

 The Chincha Islands have been visited by Mr. Kinahan, 

 a competent geologist of Dublin also, and he has pointed 

 out that they have been upheaved by volcanic agency 

 within a recent period geologically speaking. Also the 

 details of a residence at the same Island by Mr. F. Nash 

 who states that the anchors of ships bring up guano from 

 the depths of the sea. He says that an Island near Callao 

 which was raised some years since by volcanic action 

 had guano on it. The Bacillariacese or Diatomacese in 

 guano are peculiar being very beautiful. At Ichaboe, 

 in South Africa, they are brilliant discs seemingly of all 

 the colors of the rainbow, but belonging to the genera 

 Actinocyclus Ehrenhergii, Coscinodiscus and Tricerathim, 

 marine apparently beyond a doubt. Some day the ocean 

 in these parts, on the coast of Peru, will be dredged to 

 get the guano that is laying there. 



Program of the Tenth Annual Soiree of the Washington 

 Microscopical Society for May 8, 1894. 



Address BY THE President, - - - Dr. Edwin A. Gibbs. 

 "THE USES OF THE MICROSCOPE." 



Illustrated by Lantern Pictures. 

 EX H I B ITS. . 



1. Cancer, of muscle. i 



2. Miner's lung (anthracosis pulmonalis), >Dr. G. N. Acker. 



showing deposit of carbon in lung tissue. ) 



3. Anthrax bacilli in kidney of guinea pig. \ ^^ ^ ,^ \i lEGER 



4. Yeast fungus (saccharomj'ces cerevisiae). 5 • • • - ^^ 



5. Section of lymph gland of calf. Dr. E. A. BAleoch. 



6. Section of granite, showing component \ 



minerals, feldspar, quartz, mica. etc. vMr. Wm. BromwEEE. 



7. Macroscopical specimen of same rock. ) 



8. Fatty acid from fish oil (by polar- 



ized light). 



9. Scales of ferns (by polarized light). 



10. Sections illustrating histology of [ 



human eye. j Mr. Henry H. Brown. 



11. Sections of cancers. 



12. Specimens illustrating pathology. 



13. Sections of woody stems. 



