40 Captain Kater’s account of the 
Bushel No. 4. 
Date. 
Barom. 
Temp, 
of the 
Water. 
Weight of 
water con- 
tained by 
the bushel. 
80 lbs. ± 
Correction 
for 
Barometer. 
Correction 
for 
Temperat. 
Weight of 
water the 
bushel 
should have 
contained. 
80 lbs. ±; 
Error 
in grains. 
June. 
27 
Inches. 
29,77 
29 >77 
29,79 
O 
61,9 
62,0 
61,9 
Grains. 
+ 6,10 
+ 5,6° 
+ 5 > 2 ° 
Grains. 
+ 4 > 4 ^ 
+ 4 ’ 4 8 
+ 4>i6 
Grains. 
+ 3 > 5 ° 
0,0 
+ 3 > 5 ° 
Grains. 
+ 7 > 9 8 
+ 4 > 4 8 
+ 7>66 
— 1,88 
+ 1,12 
— 2,46 
Mean 
— 1,07 
In order to enable the reader to form some idea of the 
errors of the measures of capacity, it may be remarked that 
a drop of water is commonly estimated to be nearly equal to 
one grain. 
As the quantity of water contained by the bushel measure 
is determined by the surface of the glass plate, which should 
be a perfect plane, a figure not easily attainable, it is not to 
be understood that the capacity of the bushel is true within 
the limits of the errors above-mentioned, but to the gallon, 
quart, and pint measures, in consequence of their more ad- 
vantageous form, this source of error does not in any sensible 
degree apply. 
Verification of the standard yards with steel terminations. 
These standard yards were made by Mr. Dollond ; they 
are of brass, one inch square. To their extremities are firmly 
screwed rectangular pieces of steel of the same width as the 
bar, and projecting above its surface. The distance between 
the interior faces of the steel termination is intended to be 
equal to the length of the imperial standard yard. 
