542 INDEX 
Hardwood, lumber cut, 1919, 17. 
ownership of, 5. 
preparation for floating, 412. 
season for felling, 99. 
strength, influence of cutting season on, 99. 
volume, by regions, 4. 
Haulers, log, gasoline, 180. 
steam, 178, 179*. 
Hauling ability of locomotives, 346. 
Hauling, carts, 185. 
motor trucks, 198. 
road engine, 245. 
sled, 173. 
steam log hauler, 178. 
traction engine, 196. 
tractors, 209. 
wagons, 194. 
Headspar, cableway skidder, 216, 218*, 223, 226. 
Headworks, towing, 416, 416*. 
Heisler geared locomotive, 344, 344*. 
Hemlock, buoyancy of, 412, 413. 
eastern, lumber cut, 1919, 10. 
saw timber, stand, per acre, 10. 
regional, 7. 
United States, 7. 
western, lumber cut, 1919, 11. 
saw timber, stand, per acre, 10. 
regional, 7. 
United States, 7. 
saw tooth patterns for, 85, 85*. 
Hickory, buoyancy of, 413. 
lumber cut, 1919, 20. 
saw timber, stand, per acre, 19. 
regional, 7. 
United States, 7. 
High-lead yarding, 243. 
Hook, cant, 96, 96*. 
Horses, advantages of, 131. 
hauling log wagons, 194. 
miles traveled daily, 178, 195. 
picking rear on a log drive with, 416. 
rations for, 132, 528. 
regions in which used, 131. 
use in cableway skidding, 221. 
slide operation, 273. 
snaking, 145. 
snaking system, 230. 
water requirements, 134. 
weight of, 131. 
Hours, one-man, required in logging, 54. 
House, portable, material for, 66. 
bath, sanitary regulations for, 78. 
bunk, sanitary regulations for, 77. 
Hydraulic machines, incline, 338, 338*. 
Hygiene, camp, 73. 
Idaho, log flume in, 434. 
log slides in, 263*, 264*, 265* 
pole tram roads in, 281. 
