CONTENTS. 489 



PAGE 



Plots containing an acre 47 



Table, showing the square feet and the feet square of the fractions 



of an acre 48 



Table, showing the number of hills or plants on an acre, for any 

 distance apart, from 10 inches to 6 feet the lateral and longi- 

 tudinal distances being unequal 48 



Table, showing the number of plants, hills, or trees contained in 

 an acre at equal distances apart, from 3 inches up to 66 feet. . 49 



LAND MEASURE, GOVERNMENT 50 



LATHS, size of, number in a bundle, &c 279 



LATITUDE 24 



LEAD PIPE, WEIGHT OF 112 



Table, showing the weight of lead pipe per yard from to 4 



inches diameter 112 



Table, showing the weight of very light lead pipe 112 



LEVER, THE, Illustrated 279 



LIFE AND INCREASE OF ANIMALS, Illustrated 197 



Table, showing the period of reproduction and gestation of ani- 

 mals and fowls 198 



Table, showing when forty weeks (the period of gestation in a 



cow) will expire from any day throughout the year 199 



Growth and life of animals 199 



LIFE, DECREASE AND EXPECTATION OF 216 



Table, showing the decrement and expectation of life 216 



Table of St. Maur 217 



LIGHTNING RODS, Illustrated 251 



To construct a lightning-rod 251 



