276 BENJ. PIKE'S, JR., DESCRIPTIVE CATALOGUE. 



receiver, $2.50 ; 217, plate with slide rod, 82.50 ; 191, haru 

 and bladder glass, 75c. ; 211, air shower, 75c. ; 212, mer- 

 cury cup, $1 ; 195, pressure glass, 75c. ; 100, bolt head 

 experiment and jar, $1.25 ; 197, Mugdeburgh hemispheres, 

 $5 ; 200, fountain, $5 ; 208, weight lifter, |6 ; flexible tube, 

 82; 214, globe to weigh air, $1.75; 219, bell, $2.50; 222, 

 Torricellian experiment, $3.50; 225, freezing apparatus, $1.75; 

 228, flint and steel in vacuo, $5 ; 235, water hammer, 75c. ; 

 185 or 186, condensing apparatus with jets, revolving jet, 

 air gun barrel, &c., $13.50. $128.25. 



Hydraulics and Hydrostatics. 248, syphon, 75c. ; 249, 

 Wirtemberg syphon, 75c. ; 102, spirit level, $1; 238, hy- 

 drometer, 75c. ; 250, Tantalus cup, $2 ; 252 and 253, lift- 

 ing and forcing pump in frame, $10; 255, instrument to 

 show the rise of water to its level, intermitting springs, &c., 

 $7.50; 259, hydrostatic bellows, $5 ; 260, vessel for spout- 

 ing fluids, $5. $32.75. 



Galvanism, Magnetism, &c. 400, Grove's battery, twelve 

 series, large size, with glass vessel for collecting gas ; 402, 

 charcoal points, <fec., $18; 391, cylindrical pot battery, 

 $2.50 : 424, electro-magnet, $1.50 ; 4^26, magiccircle, $1.75 ; 

 427, iron rod supported in air, $2 ; .407, powder cup, 75c. ; 

 431, (Ersted's experiment, $3.50: 432, galvanometer, 

 $3.50 ; 428, magnetizing helix, $2.50 ; 449, wheel engine, 

 $6.50; 452, beam engine, $12; 410, horse-shoe magnet, 

 $1 ; 86, manner's compass complete, $2.50 ; 418, star 

 plate, 50c. ; 418, revolving armature, $1 ; 418, Y armature, 

 50c. ; 418, cross bar armature, 75c. ; soft iron rods, links, 

 filings, 25c. $60.50. 



Chemistry. Figs. 484 and 485, six glass retorts, assorted 

 sizes, three of them stoppered, $2.25 ; 489, two receivers, 

 75c. ; 483, two bolt heads, 68c. ; 482, six flasks, 50c. ; 481, 

 three bell glasses, one quart, one half gallon, and one gallon, 

 $2.25 ; one stoppered do., half gallon, $1 ; two wide mouth 

 glass jars with stoppers, for receiving gases, $1 ; 487, iron 

 retort, $2 ; eight feet of small lead pipe, 50c. ; 514, retort 

 stand, $1.50 ; 511, spirit lamp, 75c. ; 499, glass tubes, 25c. ; 

 493, three precipitating glasses, 50c. ; 494, funnel, 15c. ; 

 495, graduated measure, 63c. ; 502, six test tubes, 31c. ; 

 504, air thermometer, 19c. ; Torricellian tube, $1 ; 509, nest 



