1900] MICROSCOPICAL JOURNAL. 261 



especially to frequent the common red fuchsia. The or- 

 gan is undeniably curious, hut lacks the finish generally 

 sound in nature. — Rev. R. S. Pattrick. 



Cements. — Instead of gold- size other cements may be 

 used ; hut we have found gold-size, especially if old, most 

 satisfactory, save for certain fluid mounts. Bell's Cement 

 is excellent, and so is Ward's Brown Cement, whilst Mr. 

 Cole recommends Watson's Special Club Black Enamel. 

 Marine Glue is to us an abomination, and we have long 

 discontinued its use. Under any circumstances it must be 

 applied hot. 



Mounting in Preservative Media. — There are many 

 more or less specialized methods of this, but it will be 

 sufficient if we confine ourselves to two — namely, Canada 

 balsam and glycerine jelly. These two methods, and es- 

 pecially the first, are used universally. Objects or sec- 

 tions may need careful preparation beforehand, but we 

 will deal with these methods afterwards, assuming here 

 that, as frequently happens, no such preparation is neces- 

 sary. Canada balsam is best purchased ready for use, in 

 which case it will be obtained as a solution in benzole or 

 xylol. It should be kept in a wide-mouthed bottle, pro- 

 vided with a glass rod for dropping the contents upon the 

 slide, and with a closely-fitting cap instead of stopper. 

 The bottle must be kept closed as much as possible. Gly- 

 cerine jelly is practically a mixture of glycerine and gel- 

 atine which liquefies when warmed. It can be obtained 

 in 25 cent bottles fitted with an ordinary cork. The first 

 importaut distinction to be noticed between them is that 

 whilst objects mounted in Canada balsam must be freed 

 from every trace of water, those mounted in Glycerine 

 jelly must be first soaked in water or some aqueous me- 

 dium. 



In both cases a mounting-table and lamp should be pro- 

 vided. The table in its simplest form is a plate of brass 

 about 4x3 inches, standing on four legs about 3 or 4 in- 



