ZOOLOGY AND BOTANY, MICROSCOPYj ETC. 321 



Neat, light, and yet firm " trays," each with sawn slots for 

 holding twenty-five slides, are fitted to a polished cherry cabinet in 

 such a way that they stand on end in two rows with sufficient space 

 between the rows to make it convenient to get hold of the trays to 

 take them out. The slides thus lie flat. The upper end of each tray 



Fig. 47. 



has a printed label with numbered lines for the name of the objects 

 contained in the tray. There is a series of corresponding numbers on 

 the bottom of the box to facilitate the replacing of the slides. This 

 arrangement gives a complete list of the slides in the collection, 

 spread out when the lid of the cabinet is opened, without any handling 

 of the specimens. 



The slides should be arranged by series, those likely to be wanted 

 for use together being put in the same tray. 



Examining the Heads of Insects, Spiders, &c., alive.* — Mr. 

 E. T. Draper recommends a cone of pasted paper to be made rather 

 larger than the specimen, with the apex cut off. A vigorous spider 

 will soon project its head through the aperture. When in this position 

 it should be blocked behind with cotton wool slightly wetted. The 

 cone can then be gummed to a slip, apex upwards. 



Many insects can be arranged in the same way for the observation 

 of facial movements, and such front views admit of interesting and 

 extended study, the action of the antennae, palpi, and various organs of 

 the mouth may be watched, and curious effects produced by the 

 excitation of saccharine or nitrogenous juices, administered from the 

 top of a sable pencil. 



Examining Meat for Trichinse.t — C. Eenson describes the follow- 

 ing new process for discovering Trichince : — Slices from 2-3 mm. 

 thick are taken from several different portions of the piece of meat to 

 be examined — by preference from the surface of the flesh. From 

 each is cut a series of thin sections, which are placed together in 



* Sci. -Gossip, 1884, p. 26. 



t Bull. Soc. Eelg. de Micr., x. (1883) pp. 24-5. 



