320 SUMMAEY OF CUBKENT EESEAECHES RELATING TO 



remarkable. It can be distinctly seen under a low-power objective 

 under circumstances that a specimen in balsam would be quite 

 invisible." He " bas bad no difficulty in seeing tbe dots on the 

 valves witb a Spencer 1/10 in. N.A. 1*35, with Beck's vertical 

 illuminator, using lamplight." 



Kingsley's Cabinet for Slides.* — J. S. Kingsley has had in use 

 for some time a cabinet for holding his preparations, which, while not 

 entirely new, possesses (it is claimed) some original features. It is 

 based upon the model of Dr. Hailes,t but is more compact. 



Rectangular frames of light wood are made, measuring inside 

 S^ by 6^ in., and just the depth of the thickness of a slide (fig. 46). 



Fig. 46. 



On one side of this strips are glued of four-ply Bristol board a, in 

 the manner shown in the figure. These skeleton trays are kept in a 

 box, piled one upon another. By this plan the slides are kept flat, 

 and each one is held in place by the strips of Bristol board, which 

 form the bottom of the tray above it. The preparation and its cover 

 project between these strips ; but, as will readily be seen, are pre- 

 vented from touching the imder surface of the slides in the tray 

 above. 



The especial advantage claimed for this plan is its compactness, 

 safety, and portability ; features of no small importance when one is 

 returning from the sea- shore after the summer's work. 



Pillsbury's Slide Cabinet.l — J- H. Pillsbury has devised a 

 cabinet (fig, 47) to allow of a set of slides being taken out and 

 carried to the class-room or the society-room in safety, without being 

 transferred to trays for that purpose and afterwards replaced in the 

 cabinet. 



* Science Kecord, ii. (1884) p. 67 (1 fig.)- 



t See this Journal, iii. (1883) p. 456. 



X Science Record, ii. (1883) pp. 25-6 (2 figs.). 



