408 



CENTEAL SCIENTIFIC CO., CHICAGO, U. 8. A. 



No. 10756. 



No. 10760. 



No. 10720. 



No. 10750. 



No. 10746. 



fF7151. PLATES, Glass, colored, of best pot glass, 10 cm square. Colors as near spectral as possible to 

 produce. Edges not ground. 



B 



indigo 

 .15 



C 

 blue 

 .15 



D 



green 



.15 



E 



yellow 

 .15 



No A 



Color violet 



Each $0.15 



PLATES, Hot, see Hot Plates. 



PLATES, Porcelain Filter, see Filter Disks No. 5366.. 



10720. PLATE, Porcelain, for color reactions. Size 90x110 mm, with 12 concavities 



10724. PLATE, Porcelain, glazed, round, 5% inches in diameter 



10726. PLATE, Porcelain, glazed, square, 5V2x5% inches 



PLATE, Porcelain Streak, see Arsenic Plate. 



7316. PLATE, Porous Clay, dinner plates, for quickly drying precipitates and crystals. 

 8 inches 



F 



orange 

 .15 



G 

 red 

 .15 



.70 

 .75 

 .75 



Diameter, 

 .25 



PLATINUM WARE 



Our platinum ware is warranted pure and of the most approved shapes. Dishes and crucibles 

 are all hammered and thoroughly tested after being finished. We carry in stock only those 

 forms for which there is the greatest demand. All others furnished shortly after receipt of 

 order. Special shapes and designs will be made to order. Platinum ware will be sent only 

 by registered U. S. mail. We advise that scrap platinum sent in for credit or exchange be 

 shipped in the same manner. Old or scrap platinum is bought at the market price. Weights 

 given below are approximate only. 



Prices will be governed by the Market Price of Platinum. 

 1455. BLOWPIPE TIP, Platinum, for Plattner 's blowpipe. 

 10740. BOATS, Platinum, for combustion. Width, V 2 inch; depth, % inch; with handles. 



Length, inches 1% 2 3% 



Approximate weight, grams 3 4 6 6.5 



10742. BOAT, Platinum Filter, and Holder, Blair's, for iron and steel analysis. Length, about 2 inches; 



width, about % inch; depth, about %e inch. Approximate weight of boat and holder com- 

 plete, 19 grams. 



10743. HOLDER for Blair's Platinum Boat No. 10742, of rubber 2.50 



10746. COMBUSTION TUBE, Platinum, Seamless, 12x% inch, with prolongation 5x% inch; approxi- 

 mate weight, 130 grams. Other sizes to order. 



10750. CONES, Platinum Filter, seamless, 60, profusely perforated with holes .016 to .025 inch. 



Diameter, inches % 1 1% 1% 2 



Approximate weight, grams - 1 2.1 3.1 5.3 9.2 



10752. CONE Of Wood, with wooden mold, for reshaping platinum filter cones to the correct angle 7.00 



10756. PLATINUM CRUCIBLES, with cover. Crucible and cover weigh approximately as many grams 

 as they hold cubic centimeters. Covers are always furnished unless specified otherwise. 



Capacity, cc 8 10 15 20 25 30 



Diameter and depth, mm 22 25 30 33 35 40 



Approximate weight, grams 8 10 15 20 25 30 



Prices will be governed by the market price of platinum. 



10760. CRUCIBLES, Platinum, Gooch'S, with perforated bottom, with cover and cap for bottom. 



Capacity, cc 10 15 20 25 



Diameter and depth, mm 27 32 33 36 



Approximate weight, grams 13 18 22 29 



30 

 39 

 34 



10762. CRUCIBLE, Platinum, Gooch'S, low form with large filtering surface, as used in bitumen and 

 asphalt analysis. Capacity, 30 cc; approximate weight, 30 grams. 



