LABORATORY SUPPLIES AND CHEMICALS 119 



2459 2459b 



2459 CRUCIBLES, Alundum, for high temperature work, especially suited to coal 

 analysis drying of materials, igniting of niters and other general 

 laboratory work. 



No 5202 5203 7040 



Diameter, inches 1/4 l?i 154 



Height, inches lA lM I 1 /* 



Capacity, cc 20 40 25 



Each $0.30 .35 .35 



2459a CRUCIBLES, Covers for above. 



Each $0.30 .35 .35 



2459b CRUCIBLES, Alundum, Porous, for filtering, especially adapted to routine lab- 

 oratory work where suction is available, because of the rapidity 

 with which filterations can be made. They will hold the finest 

 precipitates and may be cleansed by heating over a Bunsen burner. 



No 5204 5205 



Diameter, inches 1^1$ 1$4 



Height, inches 1^ lii 



Capacity, cc 25 35 



Each $0.30 .35 



Above are supplied in three degrees of porosity, RA.84 dense; RA360 

 medium; RA98 porous. If no degree of porosity is specified, RA98 

 will be sent. 



2459C 2459a . 



2459c CRUCIBLES, Fused Silica, low form, unaffected by sudden and extreme changes 

 of temperature, not attacked bj acids except hydrofluoric. 



No 1 2 3 



Diameter, about mm 41 47 57 67 



Height, about mm 25 28 37 45 



Each $0.60 .75 .90 1.25 



2459d CRUCIBLE COVERS, Fused Silica, for above. 



Each $0.50 .60 .75 .90 



2459e CRUCIBLES, Fused Silica, tall style, shape of platinum crucibles. 



No 4 5 6 



Diameter, about mm 50 35 43 



Height, about mm 50 35 38 



Each $1.25 $1.25 $1.25 



2459f CRUCIBLE COVERS, Fused Silica, for above. 



Each $0.60 .60 .60 



2460 CRUCIBLES, Silver, pure silver, with covers. 



Capacity, cc 20 30 50 75 100 150 



Approx. weight, grams 35 45 60 80 100 150 



Each $3.25 3.75 5.25 7.00 8.50 12.00 



