Harrington — Modification of Victor Meyer* s Apparatus. 2 



09/ 



an ordinary cork, a correction being made for the small quan- 

 tity of air displaced by the cork, but of course one of the 

 improved appliances for introducing the liquid could be 

 employed. So far the apparatus has been tried only for bodies 

 with comparatively low boiling points, but it could no doubt 

 be adapted for use with liquids with higher boiling points. 



The following table gives a series of molecular weight 

 determinations kindly made for me by Mr. Douglas Mcintosh, 

 D.Sc, of this university, with the different forms of apparatus, 

 and gives an idea of the results which may be expected. 

 Apparatus No. II. has, on the whole, been found to give more 

 concordant results than No. I, but the latter is simpler and less 

 likely to be broken than the former and in either case the 

 figures obtained are sufficiently accurate for the purpose. 

 They were obtained by working Yery rapidly and with no 

 special precautions, and cannot therefore be fairly compared 

 with those given by Yictor Meyer's apparatus in the last 

 column ; for in the case of the latter Dr. Mcintosh states that 

 he took every precaution in order to ensure the most accurate 

 results possible. 



Molecular Weight Determinations made by Mr. Douglas 

 McIntosh, D.Sc. ( Air = 2 X 14-44) 





Modified 



Modified 



Meyer's 





Apparatus 

 No. I. 



Apparatus 

 No. II. 



Apparatus. 



Methyl 

 Alcohol 



35-0 

 36-0 







CH 2 OH 



36*9 



32'9 





(32) 



36-5 



33*4 







34-0 



33-5 



31-91 





36'9 



33-1 



31-94 





34'7 









34-8 









37*2 









Mean 35*8 



Mean 33*2 



Mean 31-93 



Methyl 

 Alcohol 



46-0 

 43-1 



44-1 





C.H.OH 



45*0 



44-7 



46-70 



(46) 



44-5 

 43-6 

 42-3 



44-3 



46-10 





Mean 44-1 



Mean 44-4 



Mean 46-40 



