xxii 
EXAMPLES TO THE FIRST SERIES. 
To find the Scantlings of any Species of Timber to have the same strength 
or deflection as those of Red Pine of a given length. 
The dimensions of Red Pine being given, the depth or breadth of 
other species of timber to have the same strength as Red Pine are 
found by Columns 2 and 3, and to have the same deflections by Col. 
5 and 6, in the Table of Constants No. 1, page 2. 
Examples to the Table of Constants, No. 1. 
Let it be required to find, by way of Example, the depth or breadth 
of Riga Fir 10 feet long, to have the same strength and elasticity as Red 
Pine 10 feet long 10 in. by 3 in. 
Weight, Depth, and Breadth, to have the same strength. 
By the Second Series of Tables, p. 70, the breaking weight of Red 
Pine 10 feet long 10 in. by 3 in., is 4 X30= 120 cwts. suspended from 
the middle. 
Example to Column I. p 2. 
Relative strength : Red Pine 1-0000; Riga Fir -8029. 
120 X -8029 = 96-348 cwts. 
The breaking weight of Riga Fir 10 feet long 10 X3, is 96-348 cwts. 
suspended from the middle. 
Example to Col. II. 
Depth to have the same strength : Red Pine 1-000; Riga Fir 1-116. 
10 X 1-116 = 11-16 inches. 
The breaking weight of Riga Fir 10 feet long 11-16X3, is 120 cwts. 
suspended from the middle. 
Example to Col. III. 
Breadth to have the same strength: Red Pine 1-000; Riga Fir 1-245. 
3 X 1-245 = 3-735 inches. 
The breaking weight of Riga Fir 10 feet long 10X3-74, is 120 cwts. 
suspended from the middle. 
