Journal of Applied Microscopy. 601 



lateral heat quite as much as a water-jacketed incubator. The shelves with the 

 standards supporting them were removed, and in their place the framework for 

 the drawers was fastened (Fig. 3), leaving a narrow space on all sides. 



The drawers are made from sheet zinc with a wooden front. Each drawer 

 is 49 centimeters long, 10.5 centimeters wide, and 19 centimeters deep. The 

 perforation at the sides and rear end allows quite free passage of air. The 

 ends are soldered, and the perforations are sufficiently high from the bottom for 

 the drawers to hold the cultures, if for any reason the tubes should break. The 

 drawers can be easily sterilized. 



The board front permits of the closing of the front of the incubator, so that 

 the opening of the door affects the temperature but very little. The sides of the 

 drawer are provided at the top with a narrow flange which runs in a metal 

 groove and in which the drawer is supported. The grooved strip is imbedded in 

 the framework. On the front end of the drawer is an inexpensive and convenient 

 pull, which is also provided with a frame for a card on which to write the name 

 of the student using the drawer. 



In regulating these we use the Roux bimetallic regulator, which is inserted 

 in the space at the back rather than at the side, as shown in Fig. 1. The 

 temperature does not vary more than a degree in the different drawers. 

 The size of the drawers would possibly be better if a trifle larger, but we 

 were obliged to use the incubators already built, and also to provide for 

 the maximum number of students, and consequently each drawer contains 

 the minimum area. I am indebted to Mr. Henry Bool, who built the 

 drawers, for his skill in minimizing the space occupied by the framework, and to 

 Mr. Raymond C. Reed of this department for the photographs. 



Veranus a. Moore. 



Department of Comparative Pathology and Bacteriology. 



New York State Veterinary College, and Cornell Medical College, Ithaca, N. Y. 



The first report on the study of malaria, made by Dr. Koch, has been pub- 

 lished in the Deutsche Medinische Wochenschrift. The parasite of malaria was 

 found in the human blood and in certain species of mosquitoes. Professor Koch 

 identifies the aestivo-autumnal fevers with tropical malaria. 



English teachers in the vicinity of the Whitechapel Public Library and 

 Museum use the natural history collections for illustrating object lessons. A list 

 of the lessons as planned is sent to the curator of the museum, and the material 

 required for the demonstration is placed on tables to which the students are 

 allowed access. In this way it is possible for them to give the specimens close study 

 in connection with their regular work. The suggestion might be of value to 

 teachers and curators of museums in this country ; collections that have been 

 studied in this way have a much greater meaning for the student than those that 

 may be observed only in glass cases, and without a special study of important 

 features and relations of different forms. 



