hk. H. Richards—dJet Aspirator for Laboratories. 421 
ASPIRATOR No. 3. q* +495 = 2: 1. 
a= °078" Barometer, 7620" 
w= °055 ir, 74° F, 
o = °230 Water, 72° F. 
Record of experiments. 
a i; H. h. H—A. 3 h. H—A. 
1732 500 744 1 743 493 415 415 0 
a 810 “3743 eee aes OM “2.8 
ee 010 4 3780 «“ ee 
1752 914* 740 6 734 740 - sa 0 
1782 940 785 114 7283 760 a a 0 
Calculated results. 
With vacuum. With no vacuum. 
Water P tension. Wi yi Air tension. 
2620°™ 713°" ToS" 0 
1608 741 1164 0 
1427 739 1045 0 
1416 734 1021 0 
1365 7234 997 0 
ASPIRATOR No. 4. eer =32 1. 
a= °090” Barometer, 764™™ 
w= ‘052 ir, 75°F. 
© ==:380 Water, 73° F, 
Record of experiments. 
G,. Ge. H. HA Gs. H. hk. Hewk 
2 
1732 570 740 53 678440 = 5565 415 415 
0 
1732 600§ 736 11 726 585 415 415 0 
600 
Caleulated results. 
With vacuum. With no vacuum. 
Water P. Air tension. Water P. Air tension. 
2292™™ 73450" 1673°" 0 
2166 725 1498 0 
ASPIRATOR No. 5. a oF —4: 1. 
a@ = *085” Barometer, 764™™ 
. w 0425 i ane ee 
© = ‘250 Water, 73° F. 
Record of experiments, 
G,. G,. H. hh. HAA G. H. hk H- 
1731 550 742 34 7383 550 415 415 0O 
1731 572°*.. 741 737 566+ * ig 0 
1731 600 737 ll 726 582 “ e 0 
57 2tt 
* ont cc. water passed per minute. 1800 c.c water passed per minute. 
+13 1540 “ ce “a “ re 
ter “ cc “ when @. or 1516 a“ u “ ac ‘i 
a gaol ce coe oer a see * te eg 
953 
Am. Jour. wsotateiice Series, Vou. VIII, No. 48.—Dec., 1874. 
