694 SUMMABY OF CURRENT RESEARCHES RELATING TO 



James's Improved Slide Cabinet.*— Dr. F. L. James fastens, by marine 

 glue, to the under side of each tray, pieces of vulcanized indiarubber, 

 1/2 in. in diameter, and 1/8 in. in thickness. These pieces are so arranged 

 that one of them comes on each end of the slide beneath it in such manner 

 that the slide is prevented from rising up against the bottom of the 

 superincumbent tray. The slips in the upper tray are held in place by 

 similar bits of rubber fastened to the cover of the box. 



Griffith's Pocket Slide Cabinet.!— Mr. E. H. Griffith's cabinet (fig. 200) 

 JR intended especially for pocket use. It is similar to another already in the 



Fig. 200. 



market, but in the place of rack-work in that, trays are iised in this. A 

 feature in its favour, that will be appreciated by those vrho carry slides in 

 pockets, is its security from opening. 



Baker, S. W.— Wax CeUs. 



[Made by building up layers of artists' wax on the slide, which is placed on the 

 turning-table, and a cut made through the first layer of wax the size of the 

 cover-glass intended to be used, and the centre taken out ; a cut is then made 

 with a needle a little inside of the first cut, extending down to tlie glass ; the 

 centre is then removed and another cut made through the wax a little outside 

 of the first cut, leaving a wall of wax to form the cell. This is finished by 

 smoothing with a piece of ivory, shaped like a chisel, thoroughly varnishing, 

 inside and out, with Brown's cement. By using dark-coloured wax for the first 

 sheet next the slide, and leaving it as a bottom to the cell, a background can be 

 made to suit any object.] 



Proc. Amer. Soc. Micr. 9th Ann. Meeting, 1886, p. 196. 

 Beokenshiee, F. K. — Mounting without Pressure, 



Scicntif. Enquirer, II. (1887) pp. 135-8. 

 Caldwell, C. T. — New Cement. 



["It is simply the article sold at the paint and oil stores under the name of 'hard 

 oil finish.' ... It runs freely, makes smooth rings, dries readily and quickly, 

 and is extremely adhesive. It is cleauly."] 



Amer. Mon. Micr. Journ., VIII. (1887) pp. 98-9. 

 Eliel, L. — Gums and Pastes for Labels. Engl. Mech., XLIV. (1887) pp. 535-6. 



Hopkins, G. M. — A quick method of mounting dry objects. 



[Recommends metal rings with a narrow internal flange at the top for the cover- 

 glass, and a wider external flange at the bottom for attachment to the slide.] 



Engl. Mech., XLV. (1887) pp. 310-11 (2 figs.), from Scientific American. 

 James, F. L. — Device for centering and holding the slide upon the turntable. 



[" It consists of the ordinary triangular jaws pivoted exactly opposite to each other, 

 and the acute end of one of the slips resting against a good strong spring. The 

 slip is shoved into place from the open end of the jaws, opposite to the end held 

 by the spring. A slide placed between these jaws is held as firmly as in a vice, 

 and the cell can be turned down or manipulated exactly as though it were in a 

 lathe."] 



Proc. Amer. Soc. Micr. 9th Ann. Meeting, 1886, p. 146. 

 Kellicott, D. S.— Kaiser's Glycerin Jelly for Plant Sections. 



[" Stained leaf sections are best shown in Kaiser's glycerin jelly to which a large 

 per cent, of gelatin has been added."] 



The Microscope, VII. (1887) p. 152. 



Proe. Amer. Soc. Micr. 9th Ann. Meeting, 1886, p. 146. f Ibid., p. 152. 



