14 BENJ. PIKE'S, JR., PRICE CATALOGUE. 



No. 



283 Fig. 195, pressure glass, - - $ 0.75 

 .284 Figr. 196, bolt head experiment, $1 ; jar for 



ditto, 25 cts., - - - 1-25 



285 Fig. 197, Magdeburgh hemispheres, three 



and a half inch diameter, brass, $4 ; four 



and a half inch ditto, - - 6.00 



286 Fig. 197, Magdeburgh hemispheres, three 



and a half inch diameter, in iron, $4 ; four 



and a half inch in ditto, - - 5.00 



287 Fig. 198, lever and stand for weighing a 



column of air, - - 5.00 



-288 Fig. 199, spouting tube, - 2.50 



289 Fig. 200, fountain in vacuo, two sizes, $4.50 and 5.00 



-290 Fig. 201, expansion fountain, - 3.50 



.291 Fig. 202, three globe fountain by elasticity, 2.50 



292 Fig. 203, lungs glass, 2.00 



293 Fig. 204, guinea and feather receiver and 



drops, - - 10.00 



294 Fig. 205, guinea and feather tube, - $4 and 6.00 



295 Fig. 206, bladder and weights, - $1.75 and 2.00 

 -296 Fig. 207, weight lifter by expansion of air, - 5.00 



297 Fig. 208, weight lifter with glass cylinder, 



3 inch cylinder, - 6.00 



298 Fig. 208, weight lifter with glass cylinder, 



3J inch cylinder, - - 8.00 



299 Fig. 209, large weight lifter, with scale board, 



4 inch cylinder, - - 15.00 



300 Fig. 210, weight lifter with brass barrel, - 7.50 



301 Fig. 210, air shower (used on hand glass), - 0.75 

 .302 Fig. 212, mercury cup " " - 1.00 



303 Fig. 213, tube for mercury shower, $4 and 5.00 



304 Fig. 214, flask with stop-cock for weighing air, 2.00 



305 Fig. 214, " with steel beam and brass stand, 6.00 



306 Fig. 215, balance beam and cork ball - 3.50 



307 Fig. 216, receiver with sliding rod, $3.50 and 4.00 



308 Fig. 219, " " " bell-shaped, $4 and 5.00 



309 Fig. 217, open-top receiver, with plate and 



sliding rod - - 5.00 



310 Fig. 218, bell in vacuo, 3 sizes, $2.25, $2.50, and 3.00 



311 Fig. 219, improved spring bell in vacuo, $2.50 and 3.00 

 812 Fig. 220, float wheel for showing the resist- 

 ance of the air, - - - - - 0.75 



