VI TABLE OF CONTENTS. 



CHAPTER XITI. 



Page. 

 Kemediks and devices for destruction 350 



Eucouragement of natural agencies, 351 — Destruction of the eggs, 351 — Har- 

 rowing in the autumn, 353 — Experiments to test the effect of alternately- 

 freezing and thawing, 353 — Experiments to test the effects of exposure to 

 air, 354 — Experience with harrowing, 355 — Plowing, 356 — Experiments to 

 test the effects of burying at different depths, 356 — Experience in plow- 

 ing, 358 — Irrigation, 359 — Experiments to test the effects of moisture on 

 the eggs, 359 — Tramping, 361 — Collecting, 361 — Destruction of the young 

 or unfledged locusts, 362 — Burning, 363 — The burning of prairies, 363 — The 

 Hetzel burning machine, 363 — The Horner burning contrivance, 363 — 

 Hand burners, 364 — The Atwood machine, 364 — Use of wire and kerosene, 

 364— Crushing, 364 — The Drum locust-crusher, 365 — The Simpson locust- 

 crusher, 366 — The Hoos locust-crusher, 367 — The Hansberry locust-crusher, 

 368 — The Kenworthy locust machine, 370 — J. C. Melcher's machine, 371 — 

 The Peteler machine, 371 — The King suction-machine, 374 — The Flory 

 locust-machine, 376 — Trapping locusts, 377— Nets and seines, 377— Ditch- 

 ing and trenching, 378— Protection by barriers, 381 — Coal-oil, 381 — Coal- 

 oil pans, 383 — The Canfield pan, 384 — The Adams pan, 385 — The Anderson 

 coal-oil contrivance, 386 — Mr, Long's contrivance, 386 — Mr. Watrous's con- 

 trivance, 387 — Mr. Swearingen's contrivance, 387 — Use of coal-tar, 387 — 

 The Bobbins' pan, 388, 390— Use of coal-tar previous to 1877, 388— Other 

 machinesfortheuseof coal-tar, 391 — Catching and bagging, 391 — Principles 

 and facts to be borne in mind in catching locusts, 391 — The Riley machine, 

 392— Mr. Thompson's net, 392— The Elliot catcher, 394— The Wilson-Rhode 

 catcher, 395— Contrivance for catching the pupse, 394 — The Godard catch- 

 er, 395— The Benson catcher, 396— The Hutchins catcher, 396— The Syl- 

 vester catcher, 397 — The Hero 'hopper-catcher, 398— The Belt device, 398 — 

 Hand-nets, 399 — Use of destructive agents, 399 — Buhach or Persian insect- 

 powder, 400 — Veith's insect-fluid, 400 — Sulpho-carbonate of potassium, 

 401 — Naphthaline, 401 — Paris green, 401 — The protection of fruit trees, 

 403 — Destruction of the winged insects, 404 — Fumigation, 405 — The effect 

 of concussion, 405 — Diversified agriculture, 406 — Legislation, 407 — Bounty 

 laws, 409 — Missouri locust act, 409 — Kansas locust acts, 410 — Minnesota 

 locust acts, 412 — Nebraska locust act, 413 — Suggestions that may be of 

 service, 414 — More attention needed to the growth of root-crops, 415 — 

 The benefits of irrigation, 415 — Hogs and poultry, 415 — Non-planting, 

 415 — Use of soldiers, 416 — Preventive measures against the winged in- 

 sects, 417 — Further investigation needed, 417 — Means that have been sug- 

 gested against the winged insects, 418 — Systematic burning of young, 

 418 — Cooperation with Dominion Government, 419 — Protection by smoke, 

 419- -Farmers should receive the locust probabilities, 420. 



CHAPTER XIV. 

 Influence of prairie fires on locust increase 421 



Reasons given why prairie fires do not influence locust increase, 421 — Possi- 

 ble indirect connection in the past, 422. 



CHAPTER XV. 

 Influence of weather on the species 423 



' Meteorological conditions affecting the life of the locust, 423 — Effects of 

 weather on the young locusts, 424 — Effects of weather on the eggs, 424 — 

 Possibility of predicting consequences upon meteorological grounds, 424 — 

 The temperature of the soil, 425 — Thermal constant for the hatching of 

 locu£t eggs, 426 — Number of hours which eggs must be exposed to hatch 

 at a temperature of 60° F., 431— Number of hours required in 1875. 



