THE AMERICAN 



MONTHLY 



MICROSCOPICAL JOURNAL. 



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



VOL, XXI. SEPTEMBER, 1900. NO, 9, 



CONTENTS. 



The History and Theory of Staining. Hollborn & Angus 241-246 



Eucaine Hydrochloride as a Narcotizing Agent. Harris 247-249 



Photo-micrographic Notes. Norman 249-353 



Notes by Shielington Scales. — Objective ; Condenser; Cat- 

 alogues ; Formalin; Manchester Society ; Swift's microscope; 

 Royal Society ; Lemon-tree Scales ; Sheep-tick Imago ; 

 Aphis with Youug ; Ovipositor of Tipula ; Humble Bee Par- 

 asite ; Disjecta Membra of Weevil ; Ovipositor of Wild Bee; 



Cements ; Preservative Media ; Balsam Mounting 253-263 



Notes bY J. H. Cooke. — Microphotography; Camera; Making 

 Notes ; Wood Sections ; Diatoms ; Pus ; Bud Sections ; Na- 

 ture Study ; Orthochromatic Photography ; Light Filter ; 

 Mounting Medium 264-269 



The History and Theory of Staining. 



DR. K. HOLLBORN AND HERBERT F. ANGUS. 



Of how many sciences can it be said that the seed was 

 sown a full century before the young shoot, destined to 

 become a great tree, showed itself above ground ? Cer- 

 tainly it is true of a very great number, and the science 

 of demonstrating histological, and cytological details by 

 means of stains is one of them. 



To Prof. Reichert, of Leipzig, is due the credit of hav- 

 ing sown the seed, others came after, who, by grafting, 

 so altered the fruit of the tree that the learned professor 

 would now, perhaps, hardly recognize it as of his plant- 

 ing, but he it was, who, in the year 1758, used a decoc- 

 tion of Pernambuco wood for studying the histology of 



