NG at eae te 
56 G. W. Hough on an Automatic printing Barometer. 
form its office. As the method was only first tested during the 
latter part of April, there were many mechanical details to be 
| Mea e 
Hours. June. July. August. Preaein Na Bde 
G 887 787 851 842 
1 878 778 838 831 
2 867 712 824 821 
¥ 3 854 764 811 810 
4 847 159 803 
5 Min. 842 754 Min. 808 Min. 800 
6 842 Min. 754 6 801 
7 846 758 816 
8 852 764 827 814 
9 866 TTT 838 a 
10 869 483 841 3 
11 Max., 872 Max., 787 84 Max., 833 
1 8 78 Max., 842 
13 869 775 828 
14 770 
15 Min., 867 Min., 768 Min., 839 Min., 825 
16 773 
17 883 783 51 839 
18 892 791 866 850 
19 801 
20 Max .902 810 Max. 870 Max. 861 : 
21 900 Max. 811 869 $60" : 
22 896 808 864 856 733 : 
23 892 804 853 850 
alanis inthe 
attended to, in order to insure conanty and accuracy in the per- 
formance of the mechanism. It is now believed, however, that 
we have overcome all mechanical defects. 
The results for maxima and minima are as follows: 
& Eg in. Max. 
‘une, 5 P.M. ll P.M, 3 A.M. 8 A.M. 
July, eee fe 2 
Aug. 5 “ce 12 “ce 3 a“ ; 8 “ 
_ Mean, ibe 11 * 3 « g « 
wah wt what bora quantities we have to deal in the dutorininnaae 
of the principal points in the diurnal curve. In order, therefore, 
to arrive at any definite conclusions, it is necessary to secure the 
accurate results attainable. 
One of the greatest im mpediments in the prosecution of any 
branch of physical science, is the large amount of personal labor — 
requisite for the reduction of observations. By our method this — 
labor is red to such an extent, that the saving in this ive 
single om would — be equal to to the « : 
cost of ai appara 
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