846 



SUMMARY OF GUERENT RESEARCHES RELATING TO 



form of water-bath for paraffin imbedding. W is tbe batb ; Z the tube by 

 whicb it is filled with water ; 1, 2, 3, 4, are glass tubes ; a is a pot for 

 melting and clarifying the paraffin ; h and c are half-cylinders with handles 

 for imbedding ; f is a thermometer bent at a right angle ; the horizontal 

 leg ends in the air-bath, which can be closed with a glass plate. The 



Fig. 229. 



temperature in the air-bath is about 10° less than the water-bath, and it is 

 used for evaporating chloroform, &c. ; t^ is the thermometer for the water- 

 bath ; R is a Eeichert's thermo-regulator. The variation in temperature is 

 less than 1° C. »• is the tube in which the gas and air mix, and / a mica 

 chimney. There is a small independent and removable water-bath v fitted 

 with water by means of rubber tubes attached to lateral openings. It is 

 supplied with a thermometer t^, is vrarmed on the platform F, and is 

 intended chiefly for orienting objects under a simple lens or dissecting 

 Microscope. 



Modification of Eeichert's Object-holder.* — Dr. J. H. List has made 

 two alterations in this object-holder, by which greater mobility of the ball- 

 and-socket joint and greater space for the play of the knife are obtained. 

 The jaws of the clamp holding the object are now made convex, and the 

 ball-and-socket joint works in one of the jaws. No impediment is therefore 

 offered to the knife, even when the clamp is turned to its utmost. By 

 shortening one of the screws moving the jaws still more room is obtained. 



Modification of the Naples Section-smoother.f — In order to increase 

 the size of the Naples section-smoother, which is somewhat too thin, 



» Zeitschr. f. Wiss. Mikr., iii. (1886) p. 484. 



t Internat. Monatschr. f. Anat. u. Physiol,, iv. (1887) Heft 2. 



