42 Captain Kater/s account of the 
that this standard yard may be considered as perfectly 
correct. 
Standard Yard, No. 2. 
The mean of sixteen measurements gave the distance 
between the lines upon the brass bars 910 divisions. This 
standard is therefore 9 divisions, or ,00038 of an inch too 
short. 
Standard Yard, No. 3. 
By the mean of six measurements this standard appeared 
to be five divisions, or ,00021 of an inch too long. 
Standard Yard, No. 4. 
The mean of ten measurements gave the error of this 
standard five divisions, or ,00021 of an inch too short. 
Adjustment of the Standard Tards with gold points . 
The standard yards last described are intended merely for 
the purpose of sizing those employed in commerce, and the 
trifling differences above stated may be utterly disregarded ; 
but the Commissioners of Weights and Measures thought it 
desirable that accurate copies of the imperial standard yard 
should be made, to be carefully preserved and transmitted to 
posterity solely for the purpose of being referred to upon 
extraordinary occasions, or upon questions important to 
science. 
The difficulty of transferring a given distance from one 
scale to another, is well known to all who are acquainted 
with the subject ; the operation is one of considerable deli- 
cacy ; and notwithstanding every precaution, is seldom abso- 
