120 Mr. Lax’s Method of finding the Latitude of a Place , &c. 
column, being intended to save us the trouble of multiplying 
by 2, when we are finding the logarithm of 
Tab. IV. In this table there are two arguments. One of 
them occupies the first column, and consists of the log. sines 
of the azimuth, which are found by subtracting the log. cosine 
of the altitude from the log. sine of the hour-angle, as they 
stand in the preceding table. The other argument is placed at 
the top of the columns, and is formed of the assumed latitude. 
The table is designed to exhibit the product of the tangent of 
the azimuth multiplied into the cosine of the latit. and into 15; 
jso that, by taking out this quantity, and multiplying it into the 
minutes contained in the error of time, we may at once deter- 
mine how much the assumed latit. is to be varied in computing 
the incremental area. 
Tab. V. There are two arguments in this table likewise. 
That which stands in the first column is the log. value of 
obtained from the second table by subtracting the log. cosine 
of the altitude from twice the log. sine of the hour-angle. The 
second argument, which is placed above the columns, is the 
supposed latitude. The table itself contains the complement of 
the meridian altitude at the place of observation. 
