338 



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



No. 8512. 



No. F781. 



No. 8510. 



8498. LEVIGATED ALUMINA for use with No. 8496, specially prepared for obtaining a correct and 

 rapid finish; in powder form. 



No A B C 



For use with steel and hard medium hard soft 



metals metals metals 



Per ounce .95 1.60 2.30 



PYROMETERS, see general heading Pyrometers. 

 MERCURY STILL, Hulett's, see Distilling Apparatus. 



8510. METEOROLOGICAL SET, Universal, a complete set of meteorological instruments suitable 

 for a beginner, and of such a quality as to give satisfaction. The set comprises a 5 inch metal 

 case aneroid barometer, 8 inch boxwood thermometer with F., R. and C. scales, 8 inch maximum 

 and minimum (Six's) thermometer with magnet, 8 inch Mason's wet and dry bulb hygrometer 

 with boxwood scale, 5 inch Howard rain gauge, and a calendar for keeping a record of the 

 instruments in the set. Packed in neatly finished box 30.00 



8512. METEOROLOGICAL SHELTER. The latest pattern Weather Bureau Instrument Shelter. 

 (Weather Bureau Bulletin No. 459.) Sufficiently large to hold Barograph or Thermograph and 

 the two instruments shown in the cut. Made of best quality white pine wood, painted three 

 coats lead paint, swing door with lock and key. Complete with screws for mounting. Shipped 

 "knocked down" 35.00 



WEATHER FORECAST CHART, see No. 14390. 



For other Meteorological Instruments, see Anemometers, Barometers, Gages, Hygrometers, Sun- 

 shine Recorders, Thermometers and Weather Instruments. 



METERS, Gas, see Nos. 6786 and 6956. 



F781. METRONOME, for counting seconds and fractional parts of a second, etc. In fine mahogany 

 case 5.00 



F782. METRONOME. Same as No. F781, but with adjustable bell attachment. The bell may be made 

 to strike every second beat, third beat, fourth beat or sixth beat 7.00 



F783. METRONOME, with electrical connection. No. F781 Metronome fitted with mercury cups and 

 binding posts for tracing time on a revolving drum in connection with a time marker. Makes 

 contact at each beat of the pendulum 18.00 



