6 



37. Crucibles and covers, nickel ; set of 3. Prices 2s., 

 2s. 6d., and 3s. 



1886. Exhibited by J. Orme fy Go. 



Nickel goods are used to some extent to replace platinum, as 

 they do not oxidise at red-heat, and they are only slightly acted 

 upon by acids. 



38. Nickel crucible and cover. Price 4s. 



1886. Exhibited by Townson Mercer. 



39. Evaporating basins, nickel ; set of 4. Prices 

 Is. 6d., 2s., 2s. 6d., 3s. 



1886. Exhibited by J. Orme Sf Go. 



40. Nickel evaporating basin, 4 in. diam. Price 4s. Qd. 



1886. Exhibited by Townson fy Mercer. 



41. Cork borer sharpener, arranged so that the brass 

 cone which is slotted to receive the thick knife blade, may 

 be introduced inside the cork borer, and the knife blade 

 pressed against the outside, so that on turning the cork 

 borer will become sharpened. Price 2s. Retort stands 

 (4). Prices 3s. to 8s. 6d. Clamps (6). Prices Is. 6d. to 

 3s. Large clamp of bell metal. Price 7s. tid. Spatula, 

 nickel plated. Price Is. 9d. Bunsen burner, nickel 

 plated, f in. diam. Price 4s. 6d. 



1886. Exhibited by Townson fy Mercer. 



42. Bunsen burners (2), of simple construction. 



Made by Warmbrunn, Quilitz, Go., Berlin. 

 E. 141 and 142. 1877. 



43. Bunsen burner, brass. 



From the Pedagogical Museum, St. Petersburg. 

 E. 745. 1877. 



44. Argand Bunsen's burners (2), -| in. size with gas 

 consumption of 3^ feet per hour. Price, with tripod stand, 

 2s. ; without, Is. 6d. 



1884. Exhibited by Thomas Fletcher. 



45. Bunsen burner, improved form, with air jet to 

 increase the temperature of the flame to any required 

 extent without re-adjustment of height or position. 



1876. Exhibited by Thomas Fletcher. 



In the above, the blow-pipe flame obtained with the blast 

 tube, when confined by the loose cap, is compact and very 



