CONTENTS,

XV

Combinations of Machinery rare, 241. Drawings to be madeto determine all the Movements, 241. Experiments forall the physical or chemical circumstances. Punching Letterson Copper, 242. Causes of Failure in Machines, 243. Wantof Stiffness in Framing. Experiment should be tried withgood Workmanship, 244. Same Experiment repeated atdistant Intervals, 245. Expense of new Machine, 247.Advice to Projectors, 248.

CHAPTER XXVI.

PROPER CIRCUMSTANCES FOR THE APPLICATION OF MA-CHINERY.

When many Things of the same Kind are required, § 249. Wherefew Things perfectly accurate are required, 250. WhereEconomy of Time is required. Newspapers, 251. “ The

Times,” 252. Conveyance of Letters, 253. Steam-car-riages, 25G. Diving Vessel, 25". Slide of Alpnach , 258.Competition between Machine and Hand Labour, 259.

CHAPTER XXVII.

ON THE DURATION OF MACHINERY.

Engines to produce Power last long, § 261. Improvements in-crease Production, 262. Age of Watches, 263. Machineslet for Hipe. Unexpected Effect of a Change in the Rent ofStocking Frames, 264. Stamps, and Dies, and Steam Power let out, 266.

CHAPTER XXVIII.

ON COMBINATION AMONGST MASTERS OR WORKMEN AGAINSTEACH OTHER.

Rules in particular Factories, § 270. Larger Societies, 276.Objects of them, 277- Effects, 278. Gun Barrels, 279.Fear of Combination causes Expense, 282. Coal and IronWorks, 283. Cause of Removal of Factories, 2S5. TheTruckSystem 287. Payment of Wages in Goods, 289.