40 



MR J. Y. BUCHANAN ON THE 



Table 



Hydrometer No. 17. 



Details of Determination of the Total Weight of the Hydrometer 



Particulars of hydrometer, 



a 







Hydrometer No. 17. 



Reference to laboratory note-book, 





• 













h 





XXVm. 59 

 1905 



XXV 11 1. 61 



1905 



XXVIII. 63 

 1905 





Uatfi of experiment, . 

















c 





June 6 



June 6 



June 6 





Time at start, . 



















d 





10.52 a.m. 



11.42 a.m. 



12.25 p.m. 





Temperature at start, 



















c 





23-05° 



23 00° 



23-03° 





Added weight, w, nnd reading, 



R, 

















/o 



w 



R 



R 



R 





First added weight or reading. 



















/l 



0-25 



2 2 



1-8 



2-2 





Second ,, ,, 



















/a 



0-35 



13-5 



12-2 



12-5 





Third 



















/s 



0-45 



24-8 



23-8 



24-5 





Fourth 



















/4 



0-55 



35-8 



35-0 



35-8 





Filth 



















/s 



0-65 



47 



46-2 



46-8 





Sixth 



















/e 



075 



68-0 



57-2 



57-2 





Seventh ,, ,, 



















A 



0-85 



690 



68-5 



68-8 





Eighth 



















/a 



0-95 



80-0 



79-5 



79-2 





Ninth ,, „ 



















/d 



1-05 



90-8 



90-5 



91-2 





Mean added wej^ht, w, 



















9 



0-65 











Mean reading, R, 



















h 



... 



46 '-jg 



46-08 



46-47 





Time at finish, . 



















i 



... 



11.15 a.m. 



12.00 p.m. 



12.40 p.m. 





Final temperature, _. 



















3 





22-85° 



22-90° 



23-02° 





Mean temperature, T, 



















k 





22-95° 



22-95° 



23 025° 





Range of temperature. 



















I 





0-20° 



0-10° 



0-01° 





Difference of mean reading from 50 mm. (50-R = <^r), 











m 





3-21 



3-92 



3 -,^3 





Weight ei|Uivalent to displacement, df {=dwr), 











n 



... 



0-0290 



0-0354 



0-0319 





Weiglit required to immerse liydrometer to ."iO-mm. mark at mean tempera- 









0-6790 



0-6854 



6819 





ture, T, {w + dwr). 















Difference of mean temperature, T, from standard temperature {T-T^dl), 



P 





-0-05° 



-0-05° 



0025° 





Coriection for diti'ereace c?i (=rft«(), 



q 





-0-0015 



-0-0015 



00007 





Weight required to immerse hydrometer to 50-mm. mark at standard tem- 



r 



... 



0-6775 



6839 



0-6826 





perature, T, { = w + dwr + diLH), 















Total weight displaced by hydrometer when iloating at 50-mm. mark at 



s 





181-5888 



181-5952 



181-5938 





standard temperature, T, 















Table 



Hydrometer No. 17. 



Details of Determination of the Total Weight of the Hydrometer 



Particulars of hydrometer. 

 Reference to laboratory note-book. 



Date of experiment. 



Time at start. 



Temperature at start, 



Added weight, w, and reading, R 



First added weight or reading. 



Second ,, ,, 



Third 



Fourth ,, ,, 



Fifth 



Sixth ,, 



Seventh ,, ,, 



Eighth ,, ,, 



Ninth ,, ,, 



Mean added weight, w, . 



Mean readinjr, R, . 



Time at finish, 



Final tcmpeiature, 



Mean temperature, T, 



Kange of tempeiature, . 



Dill'erence of mean reading from 50 mm. (50- \i = df) 



WeiL'ht equivalent to di.splacenicnt df ( =dw,), . _ 



Weight required to iramor.se hydrometer to 50-mm. mark at mean temperature, T, {iv + dWr). 



Dill'eieiice of me in temperature, T, from standard temperature (T - T = rf?) 



Correction for dilletence d/I (=rfw(), ....... 



Weisiht required to immerse hydrometer to .'iO-mm. maik at standard temperature, T, 



( =w + dwr + dwt), 

 Total weight displaced by hydrometer when floating at 50-ram. mark at standard 



tem[)erature, T, 



a 

 b 



c 

 d 

 e 



/o 

 /i 



A 



fz 



/4 



h 

 h 



fn 

 fs 



h 



9 

 h 

 i 



J 



k 

 I 



m 

 n 







P 

 9. 



r 



Hydrometei- No. 

 VIIL 47 



1903 



July 2 



3.20 p.m. 



26-00° 



17. 



w 

 0-175 

 0-275 

 0-375 

 0-475 

 0-575 

 0-675 

 0-775 

 0-875 

 0-975 

 0-575 



R 

 6-0 



17-1 

 28-5 

 39-8 

 50-8 

 62-0 

 73-2 

 84-3 

 95-6 



50-81 

 3.35 p.m. 



26-10° 



26-05° 

 0-10° 



-0-81 



-0-0072 

 0-5678 

 0-05° 

 0-0018 

 0-5696 



181-4809 



