SANDAL-WOOD OIL. 189 



out anilin colours more quickly than old. It is well to possess 

 trustworthy samples of both new and old oil. 



333. Cannel Oil. Greatly resembles clove oil, but is in 

 general thinner. An excellent medium, which I particularly 

 recommend. 



334. Oil of Bergamot. SCBIEFFERDECKER (Arch. Anat. u. 

 Phys., 1882 (Anat. Abth.), p. 206) finds that this oil has 

 many good qualities ; it clears 95 per cent, alcohol prepara- 

 tions and celloidin preparations quickly, does not attack 

 anilin colours, but the strong odour is disagreeable ; it is as 

 dear as oil of cloves, twice as dear as oil of origanum, and 

 three times as dear as oil of cedar. He considers its action 

 preferable to that of oil of cloves, but, all things considered, 

 gives the palm to cedar and origanum. I think that this is a 

 very valuable medium, and though I do not agree with 

 Schiefferdecker in thinking its action superior to oil of cloves, 

 I think it should always be kept at hand. 



Bergamot oil is, I believe, the least refractive of these 

 essences, having a lower index than even oil of turpentine. 



335. Oil of Origanum (NEELSEN and SCHIEFFERDECKER, Arch. 

 Anat. u. Phys., 1882, p. 204). Price per kilo 15 mark ( = 15*.)- 

 Thin, light brown colour, odour not too strong, agreeable, 

 does not evaporate too quickly, is not changed by light, is 

 miscible with chloroform balsam and with castor oil. Ninety- 

 five per cent, alcohol preparations are cleared quickly, and so 

 are celloidin sections, without solution of the celloidin. Anilin 

 colours are somewhat extracted. 



For work with celloidin sections care should be taken to 

 obtain 01. Origani cretici (" Spanisches Hopfenol J> ), not 01. 

 Orig. gallici (v. GIBSON; see Zeit.f. wiss. Mile., iv, 4, 1887, 

 p. 482). Specimens of origanum oil vary greatly in their 

 action on celloidin sections, and care should be taken to 

 obtain a good sample. 



336. Sandal- wood Oil (NEELSEN and SCHIEFFERDECKER, Ibid.). 

 " Finest East Indian sandal-wood oil,", price per kilo 50 

 mark (= 2 10s. Od.). Somewhat thicker than the last two, 

 light yellow, odour faint, agreeable, evaporation hardly per- 

 ceptible, unchangeable by light, miscible with chloroform 

 balsam and with castor oil. Ninety-five per cent, alcohol 



