174 THE MICROSCOPE. [August, 



Rud. Siebert. of Vienna, who displayed a variety of fine labora- 

 tory apparatus, among which the delicate glassware was notable. 

 He also exhibited bacteriological apparatus, mostly of the smaller 

 sorts, in great perfection and variety. 



Microtomes and their accessories formed two special exhibits 

 of nearlv equal size and interest, by R. Jung, of Heidelberg, and 



C. Erbe. of Tubingen. Both of these exhibits covered a wide 

 range, from the magnificent and costly machines capable of cutting 

 verv large sections with the greatest delicacy, to the smaller and 

 simpler affairs that were carefully contrived and well made and 

 efficient for the general use of students. Both of these makers re- 

 ceived diplomas of honor, the medium models of Erbe being 

 especially complimented for their combination of fine workman- 

 ship and moderate price. 



Of the microtomes offered by the general manufacturers, those 

 by A. Nachet, of Paris, and Chas. Reichert. of Vienna, were 

 most remarkable. 



^Microscopical Preparations. 



Perhaps the most famous professional preparer of objects is J. 



D. Moeller, of Wedel, Holstein, whose type slides of 400 diatoms 

 have long been familiar. In addition to a varied selection of ex- 

 cellent diatoms and other mounts, he exhibited his greatest and 

 incomparable production containing at once 4,030 diatoms sys- 

 tematically arranged and accompanied by an atlas of 59 folio 

 plates illustrating the different portions of the preparation. 



Scarcely, if at all, inferior in scientific or commercial impor- 

 tance, were the large and varied exhibits of excellent slides by 

 Edward Tlium, of Leipzig, and J. Tempere, of Paris. The last 

 named preparer, a series of whose instructive preparations was 

 selected for projection upon the screen to illustrate lectures in the 

 amphitheatre, showed comparative slides having six different 

 kinds of blood, or of wood sections, etc., ingeniously and con- 

 veniently grouped and labelled on one slide. 



Dr. Joseph Montaldo, of Turin, exhibited a large and fine col- 

 lection of slides illustrating wood-structure ; and Drs. M. and Ad. 

 Jolles, of Vienna, contributed a similarly valuable study of food- 

 substances. 



Even more notable, though out of competition for the prizes, 

 was the collection of 10,000 prepai;ations by a member of the jury. 

 Prof. H. Bolsius, S. J., of the theological college at Louvain. 

 These slides represented in serial sections (with also a resultant 

 monograph) a study in the anatomy of the leaches, the whole 

 being, to say the least, one of the best examples of individual 

 work in the exposition, and offering to every visitor an instructive 

 and inspiring model of good work in laboratory biology. 



jSIr. Julien Deby, of England, received a gold medal in rec- 



