THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL 



Entered at the post-office as second-class matter. 



VOL. XXI. JUNE, 1900. NO. 6. 



CONTENTS. 



Advice to Young People who wish to Huut Diatoms. Edwards.... 151-155 



The Study of Little Things. Edwards 155-156 



Report on Microscopy to the Medico-Legal Society. White... 156-159 



The Microscope in the Drug Store. 159-164 



Bacteriological Diagnosis in Kalamazoo. Crane. 164-166 



BioLOGicXiv Notes — PammEl. — Lichens ; Crown-gall ; Chro- 

 matophores and Nuclei ; Anatomical Atlas ; Plant Diseases; 

 Ropy Milk: Bacillus; Prodigiosus; Rancid Butter; LacticAcid 



Ferments and Cheese Ripening 167-170 



Notes bv J. H. Cooke. — Preparation of Marine Worms ; Mi- 

 crophotography ; Staining Bones ; New Lamp ; Screen ; Fo- 

 cussing; Opaque Objects ; Plates 171-174 



Notes by Shih,ington Scales. — Illumination I74-177 



MiscELt,A.NEous Notes. — Society Screw 177-178 



New Publications. — Acetylene ; Plants, Text-book of Botany.. 178-179 



Advice to Young People Who Wish to Hunt Diatoms. 



ARTHUR M. EDWARDS, M.D., F.L.S. 



Now the time has come in the Middle States, to be out 

 of doors, and it is just beginning in Canada. On the Pa- 

 cific coast it is always. The young people with micro- 

 scopes, one-lialf inch objectives, want to know how to hunt 

 for Diatoms. I hope they will get as much satisfaction 

 and stimulus from it as I did over forty years ago. 



The Diatoms are not what we call Diatomaceae or Ba- 

 cillaria, for that is the older name given to them by 

 Agardh and Kutzing. The latter studied them and pub- 

 lished them as living things. Ehrenberg, who gained so 

 great a noteriety, studied them and published his big 



