INDEX 



Helix, Length of, 52. 



Herring-bone expanded 

 metal, 266. 



High-carbon steel, 252. 

 temperatures, Concreting 

 at, 246. 



Homogeneous beams, 129. 



Hooke's law, 123. 



Hooped column reinforce- 

 ment, 302, 305. 



Hot weather, Concreting in, 

 246. 



Hyatt bar, 255. 



Hydrated lime, 193. 



Hydraulic cement, Weight 



of, 196. 

 lime, 193. 



I beams, Properties of, 148. 

 Imperviousness, Effect of 



strength and, 234. 

 Improved cement, 195. 

 Inch, Table of decimals of a 

 foot for fraction of an, 

 14. 



Inertia, Moment of, 129. 

 Ingredients for concrete, 



244. 

 Methods of measuring, 



242. 



Proportioning of, 234. 

 Initial set, 222. 

 Insert, Continuous, 330. 



Hancock, 328. 

 Inspection, Field, 208. 



of cement, 229. 

 Integral method of water- 

 proofing, 342. 

 Involution and evolution" 



25. 

 Iron column, Wood and 



cast-, 179. 

 columns, Cast-, 187. 

 column, Dimensions of 

 standard connections to 

 cast-, 190. 

 column, Safe load on 



cast-, 188. 



Plain bar, 254. 



Irregular areas, 55. 



Jennings-Steinmetz socket, 



328. 

 Johnson bar, 258. 



bar, Table of properties 



of. 258. 

 Joining old and new work, 



247. 



Kahn cup bar, Table of 

 properties of, 257. 



expanded metal, Table of 

 properties of, 265. 



system of reinforcement, 

 271. 



trussed bar, 260. 



Lath, Herring-bone metal, 



266. 



Law, Hooke's, 123. 

 for steel, 361. 

 for walls, 361. 

 Laws, Building, 357. 

 Laying mortar in freezing 



weather, 206. 

 Le Chatelier flask, 225. 

 Legs, Properties of standard 

 angles having equal, 

 154. 



Properties of standard 

 angles having unequal, 

 158. 



Length of arc, 51. 

 of chord, 52. 

 of helix, 52. 

 of spiral, 54. 

 Lengths, Measure of, 5. 

 Lime and cement mortars, 



199. 



Common, 193. 

 concrete, 230. 

 Fat, 193. 

 Hydrated, 193. 

 Hydraulic, 193. 

 Meager, 193. 

 mortar, 200. 

 or clay, Waterproofing by 



adding, 343. 

 Poor, 193. 



