LOVETT'S CEMENT. 215 



what important matter), see WITT, Zeit. f. wiss. Mik., 1886, 

 p. 199. 



For SEAMAN'S shellac cement for attaching metal to glass, 

 see Journ. Roy. Mic. 8oc., 1888, p. 520. 



425. Sealing-wax Varnish (Micro. Diet., "Cements"). Add 

 enough spirit of wine to cover coarsely powdered sealing-wax, 

 and digest at a gentle heat. This should only be used as a 

 varnish, never as a cement, as it is apt to become brittle and 

 to lose its hold upon glass after a time. 



426. Tolu Balsam Cement (CARNOY'S Biol. Cell., p. 129). 

 Tolu balsam . . . .2 parts. 

 Canada balsam . . . 1 

 Saturated solution of shellac in chlo- 

 roform . . . . 2 ,, 



Add enough chloroform to bring the mixture to a syrupy 

 consistence. Carnoy finds this cement superior to all others. 



427. Stieda's White Zinc Cement (Arch. f. mik. Anat., 1866, 

 p. 435). Rub up oxide of zinc with turpentine, and add, 

 stirring continually for every drachm of the zinc oxide, 1 

 ounce of a solution of damar in turpentine (of the consist- 

 ency of thick syrup) . This gives a white cement like Ziegler's. 

 For a red cement, take, instead of zinc, cinnabar, and take 2 

 drachms of the metal for each ounce of the damar solution. 

 If the cement has become too thick with age, dilute with 

 turpentine, ether, or chloroform. 



428. Ziegler's White Cement. Composition unknown. Is 

 very much used on the Continent. 



429. Kitten's White Lead Cement (Month. Mic. Journ., 1876, 

 p. 221). Equal parts of white lead, red lead, and litharge 

 (all in powder), ground together with a little turpentine until 

 thoroughly incorporated, then mixed with gold size. The 

 mixture should be thin enough to work with a brush. No 

 more of the cement should be made than is required for 

 present use, as it soon sets and becomes unworkable ; but a 

 stock of the materials may be kept ready ground in a bottle. 



430. Lovett's Cement (Journ. Roy. Mic. Soc., 1883, p. 786). 

 Two parts white lead, 2 parts red oxide of lead (minium), 3 

 parts litharge. To be ground very fine, mixed dry, and kept 



