AND RATIO OK IMEIR ATOMIC WKHillTS. 49 



gether is o-reater, but the principle is the suiiie. For iiistaiKH', in weighing globe 

 No. 5 when exhausted anil closed as desi-ribetl on page 47, wc have the fol- 

 lowing volumes on the two sides ot" the balance: 



(ilol)e 5 C'ounterjKjisc 5 



Joint 3 1 1 cc. 



Space below m;trk <-, l''ig 20 i.oS " 



Space above mark <• 0.10 " 



Brass weights 262 



Platimim weights 0.03 



Small ecpiating flasks 1.41 " 8.35 cc. 



Sums (".5+CS.35 " , C5+8.35 cc. 



Since the volume of globe 5 is e(iual to that of its counterpoise when the 

 o-lobe is exhausted, G^ = C^, hence the volumes on the opposite sides of the bal- 

 ance ai'e e(|ual, so that the inunediate result of the weighings, with no ob.servation 

 of temperature and pressure, and with no computation of correction, gives the true 

 difference of w^eight between the globe and its counterpoise. 



30. — OXVOEN BY SKl'O.Nl) .M KTHoD. OBSERVATIONS. 



The following table gives the weights obtained of globes tilled with oxygen 

 at the same temperature and pressure as that of the hydi-ogen w hich was used as 

 a standard of conijiarison. 



OBSERVATIONS WITH (JI.OBE 5. 



Date. Weight, gr. 



May 25 Filled 4.3827 



" 28 Exhausted 34.2284 



Renewed lubrication : 



June 10 Filled 47165 



21 Exhausted 34.55 i 2 



Renewed joint : 



June 24 Exhausted 30.3731 



" 25 Filled 0-5466 



27 " 0.5482 



29 " 0.5473 



July I " 0.5441 



" " I Exhausted 30.3735 



October 31 " 30-3734 



November 7 Filled 0.5358 



iQ [[ 0.5376 



December 4 " 0.5394 



OBSERVATIONS WITH (;l.OBK 3. 



May 20 Filled 0.0190 



26 Exhausted 27.7736 



