ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
351 
Carmine has a similar effect on diphtheria toxin. A carmine-diph- 
theria mixture containing ten fatal doses of toxin excites no intoxication. 
Method of making Type Slides for Opaque Objects with Remov- 
able Covers.* — Mr. D. B. Scott describes this method of constructing a 
slide divided into 300 spaces of varying sizes. For the details of the 
procedure the original should be consulted. 
Journ. Quekett Micr. Club, vii. (1899) pp. 167--70 (2 figs.). 
