1 886.] NEW-YORK MICROSCOPICAL SOCIETY. 15 



flowers. One of these rings can be picked up from the flat 

 table, by placing the slide upon it with the cover of the mount 

 down, so as to insure the cover being central with the ring, and 

 using very slight pressure, for otherwise the wax would adhere 

 to the table. When the ring has been picked up in the right 

 position, the heat of a small flame is cautiously applied under the 

 slide, until the ring softens, and settles down first on one side, 

 and then, following round under the ring cautiously, until the 

 wax is just melted, but not so as to run, which would spoil the 

 symmetry and beauty of it ; if an air bubble is entangled, it may 

 be touched while the wax is still melted, with a hot pin point, 

 or point of forceps warmed. As soon as the ring has been all 

 melted the slide can be put on the table, to let the wax harden, 

 and as soon as the slide is thoroughly cooled, the wax ring and 

 cover can be rubbed vigorously, and the ring polished. These 

 rings will bear any amount of rubbing, and do not need any sub- 

 sequent applications of varnish, though there would be no ob- 

 jection to the use of them, either for ornament or for a still 

 more efficient protection of the mount. I have recently made 

 some mounts, sealing them in another manner, which appears to 

 answer well ; rings are punched out of paper about the thickness 

 of the cover, and with a central opening of the same size as the 

 cover. After making the mount and cleaning it, one of these 

 rings is placed on the slide, having the cover just coming through 

 the opening, flush with the surface. Then a bit of parafiine is 

 placed on one side and melted ; of course, it flows in and under 

 and saturates the ring, and runs in between the inner margin 

 of the ring and the cover ; the whole is now cooled, and rubbed 

 vigorously, thus removing the excess of the parafiine. These 

 mounts appear to keep well. 



Formula — 2 fluid-drams boro-glyceride, 50 per cent, solution, 

 I Yi oz. antimony bromide. 



Warm the boro-glyceride solution, and add the antimony 

 bromide in small portions, heating until all is thoroughly dissolv- 

 ed; the heat must be applied carefully to avoid browning, but must 

 be sufficient to dissolve thoroughly the bromide ; on cooling, 

 the mixture will be nearly solid, and will measure somewhat 

 more than one fluid-ounce. In conclusion, I may say, that 

 while the boro-glyceride appears to answer so admirably for 



