98 THE MICROSCOPE. July 



the desmidiaceae. For elementary knowledge on tliese 

 beautiful plants, see Carpenter on the Microscope. 



1. Euastrum cambrense. 



2. Euastrum snowdoniense. 



3. Euastrum binale. 



4. Euastrum webbianum f. major. 



5. Euastrum crassicolle ? 



6. Euastrum anglicanum. 



7. Cosmarium gotlandicum v. cambrense. 



8. Staurastrum lewisianum. 



9. Staurastrum westii. 



10. Staurastrum diplacanthum v. anglicum. 



11. Staurastrum eboracense. 



12. Staurastrum trelleckense. 



13. Micrasterias papillifera v. varvicensis. 



14. Micrasterias truncata. 



15. Penium lewisii. 



16. Docidium hutchinsonii. 



17. Closterium intermedium v. sculptum. 



18. Cylindrocystis roseola: 



19. Spondylosium monile. 



20. Spondylosium armillatum. 



21. Eurastrum exile. 



The Microscope in the Dairy. 



By prof. H. W. conn, 



WESLEY AN UNIVERSITY. 



The great service that the microscope has been to the 

 brewing and vinting industries in the hands of Pasteur 

 is well known. At the present time no brewery is 

 equipped without its microscope and its microscopist for 

 the purpose of studying its yeasts and obtaining the 

 proper pure cultures of appropriate species for fementa- 

 tion. The great importance of this application of the 

 microscope to the brewing industry is to-day hardly 



