1 L2 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



stage with paraffiu m.p. 48°-50 is advisable. The objects are em- 

 bedded in a metal frame placed on a warm glass plate, and when the 

 surface of the paraffin is set the plate is at once placed in cold water. 



Poso, P. — Tiber Fixierung- und Einbettung von Placenta und Uterus des Menschen. 



Zeitschr. wiss Mikrosk., xxvii. (1910) pp. 353-9. 



(3) Cutting, including- Embedding- and Microtomes. 



Apparatus for Rolling Wax Plates.* — 0. Berner describes an 

 apparatus (fig. 17) by means of which wax plates of any required 

 thickness can be rolled for reconstruction work. It consists of an iron 

 plate, a heater, a steel roller, and a special heater for the roller. The 

 iron plate, of which the dimensions are 60 x 40 cm., is supported upon 



Fig. 17. 



four metal feet, provided with screws for adjusting the level. This 

 plate carries the wax. Along the long sides of the plate are guide- 

 ridges, along which the rolling-pin travels. Screws, M, adjust the height 

 of these guide-ridges, and so determine the thickness of the plate. 

 Underneath the plate is a copper water-vessel, provided with a thermo- 

 meter, T. This vessel is heated by a Bunsen burner ; it is filled through 

 the tube a, emptied through the tube b. The rolling-pin is a solid steel 



* Zeitschr. wiss. Mikrosk., xxvii. (1910) pp. 44-7. 



