ITS ERRORS AND CORRECTIONS, ETC. 481 
The final result is, 
,_2AR_ 1275-74 
| SA oF 639-01 

=1'520 se. div. ; with a probable error of 0-049 sc. div. 
[7]=0-000182 
By water experiments, 
Whence 
q=0:000234 
[q]=0-778 g. 
30. In order to render the following determinations comparable, the sums of 
scale readings after 1st April 1846 have been multiplied by 0-948 to reduce them 
to the value of & before that date. 
August 1843 to March 1846, k=0:000229 
April 1846 to September 1848, &=0:000217 
TABLE IX.—Sums or DIFFERENCES OF BIFILAR DAILY MEANS AT HOBARTON, 
Avucust 1843 TO SEPTEMBER 1848. 







Month. Month. 
1843 1845 . Se. div. | Se. div.| 1847 > | Se. div. | Se. div. 
Jan. Agé ae 3b Jan. | 54°66 | 26:93 | 0°49 | Jan. | 38°58 | 18:90; 0:49 
Feb. Ene ade ene Feb. | 35:16 | 29-51 | 0°81 | Feb. | 38°94 | 18:36; 0-47 
Mar. oe Bag ae Mar. | 40°35 | 26:02 | 0:64 | Mar. | 48°30 | 40:00} 0-82 
PepTIN |) os. ahs ... | April |40°71 | 44:43 | 1:09 | April | 35°10 | 29:23} 0:83 
May biare dee .. | May | 37-21 | 21-66 | 0°58 | May | 35°64 | 17-52) 0-50 
June ant a ... | June |34:30 | 29:96 | 0:87 | June | 23-20 | 16-57| 0°71 
3M ae ae July (38:50 | 32°66:| 0°92 | July | 26:51 | 21:88) 0°82 
Aug. | 42:94 |30:80 | 0°71 | Aug. | 2°:26 | 24-09 | 0-88 | Aug. | 83:29 | 21:98; 0-66 
Sept. | 89°21 | 31:20 | 0°80 | Sept. |42°44 | 21-61 | 0°51 | Sept. | 40-00 | 34:04) 085 
Oct. | 58:25 | 37:33 | 0-64 | Oct. | 55°73 | 43°35 | 0-78 | Oct. | 39-79 | 34:48) -86 
Noy. | 42°72 | 32:99 | 0:77 | Nov. |54°86 | 45:47 | 0-83] Nov. | 38°87 | 18:95| 0-48 
Dec. | 38:21 | 25:44 | 0-67 | Dec. | 39:99 (37-15 | 0:93 | Dec. | 50-77 |—0-74 |—0-02 
1844 1846 1848 
Jan. | 49°27 | 30-22) 0-61 | Jan. | 52°77 |41-39-| 0-78 | Jan. | 54-93 | 38°91| 0-71 
Feb. | 48:08 | 31:68 | 0:66 | Feb. | 51:57 | 48°70 | 0:94] Feb. | 50-99 | 82-11] 0-63 
Mar. | 58°21 | 45-11 | 0°85 | Mar. | 52:54 |66-25-| 1:26 | Mar. | 40-52 | 32:27) 0:80 
April | 40°05 | 27-43 | 0-68 | April | 39:98 | 32°45 | 0-81 | April | 58-25 | 23°35) 0-40 
May | 38°65 |29°17 | 0°75 | May | 31:96 | 12-48 | 0:39 |} May | 27-38 | 19°15; 0-70 
June | 27:46 |21-61 | 0:79 | June | 30°82 | 22-36 | 0:73 | June | 23:83 | 12°25| 0-51 
July | 29°56 | 22-05 | 0-75 | July | 20°94 | 7-87 | 0:38 | July | 22-69 | 5:56} 0:25 
Aug. | 21:13 |11:38 | 0°54 | Aug. | 34°41 | 28-01 | 0-82 | Aug. | 21:12 | 27:94) 1:38 
Sept. | 25:53 | 20:44 | 0°80 | Sept. | 42-58 | 30-40 | 0-71 | Sept. | 26-69 | 16:09} 0°44 
Oct, (37:28 | 28°71 | 0-77 | Oct. | 51-58 | 26°77 | 0-52 tase mee 
Nov. | 40:97 | 18-64 | 0:45 | Nov. |42'58 | 31:09 | 0°73 
27°15 


























The final result is— 
For k=0:000229 
=0°692 se. div.; probable error, 0:017. 
For k=0:000217 
q' =0°730 sc. div. 
[g] = 0000158, 
,3aR _ 1708-11 
~3At 2462-27 

