1893.] MICROSCOPICAL JOURNAL. 147 



were practicallv the satnc. l>iit the time and ease of manipulation 

 lie regarded so much in favor of the pieces of apparatus especially 

 constructed for the purpose that they alone seemed to him really 

 practicable for tpiickly and easily measurincr all the cover-ijlasses 

 that woidd he used in a liistoloi^ical lahoratorv in three months. 



Ml( H()S((HM( AL .M.VMPl LATION. 



Cleaning Mortars. — Make a strong s<dution In dissolving 

 caustic soda in a huge bottle of water, which can be kept near 

 the water-sink. First rul) the inside of the mortars or other 

 utensils well with sawdust, then use the caustic alkali solution, 

 which will remove either resins or oils. Alcohol would do, l)ut it 

 is expensive. 



Cleaning Steel Instruments. — Clean the instruments Ijy 

 rul)i)ing with wo(j(l ashes and soft water. Then soak them in a 

 weak solution of hvdrocliloric acid in water (about ten to fifteen 

 drops to the fluid ounce) for a tew hours, to remove the rust and 

 grease. Then wash them well in pure soft water. The next 

 step is to place them in a bath consisting of saturated solution of 

 tin chloride. Let them remain ten to twenty-four hours, accord- 

 ing to the coating desired. When removed from the bath, wash 

 them clean in pure water and dry well. When the job is well 

 done, tlie steel will appear as if nickel plated. — Medical Brief. 



BACTKRlOLOCn. 



Soft Chancres. — -Some Russian physicians have examined 

 fifteen cases of soft chancres as follows : Having washed out an 

 ulcer with a permille solution of corrosive sublimate, they ex- 

 tracted (bv means of a sterilized needle) some discharge with 

 detritus, spread the matter over a glass plate, and stained the speci- 

 men with Sahli's solution (sixteen grammes of a five per cent, 

 solution of borax, twenty grammes of a saturated aqueous solu- 

 tion of methvlene-blue, and twenty-four grammes of distilled 

 water), after which they examined it under the microscope 

 (Leitz's Ocular No. 3, and immersion system one-half). In 

 every one and all of the cases there were detected the character- 

 istic microbes first described bv Dr. Ducrey, of Naples. In 

 other words, there were invariably present peculiar short and 

 relatively rather thick rod-shaped bacteria, measuring from 1.48 

 to 2 m. in length, and from 0.5 to i.o m. in width, and resembling 

 the figure S (Ducrey, Petersen), or dumb-bells (Krefting). The 

 bacilli were partly lying free (singly, or in rows, or in groups), 

 \\\\(\ partly embedded within leucocytes. In the discharge taken 



