Show the development of spraying one may explore our literature up to 1870 in fruitless search of even the mention ol of spraying or spraying machinery and the nearest that he will vill come thereto will be an occasional I 1 mention of the dusting ot of plants with paris green or arsenic mixed with flour limo lime or ashes the oldest patent on record for a machine to apply liquid poisons on a large scale was the johnson spray machine patented december 16 1873 by judge jehu W johnson of Columbus texas this was simply a tank mounted on a cart with a double acting force pump attached to the top of 0 the tank it was about this time that mr gross of ripon wis invented an instrument for spraying potato vines with a mixture of paris green and water to destroy the potato beetle it was not until five years later that much was accomplished shed and not till 1880 that the matter of spraying with arsenical iI elsons sons began to attract general attention and even then largely as against the cotton worm and colorado potato beetle and not as against orchard pests except perhaps the canker worm in 1875 mr J N dixon of 0 oskaloosa loua iowa in spraying his big orchard to destroy canker worms norms found in the tall fall that where he had bad applied a solution of arsenic there was no injury from codlin moth and we bad the first intimation of what could be accomplished in poisoning the larvae ot of that insect the matter was not generally brought to public attention ho however uever until 1882 in a prize essay presented at the meeting of the iowa state horticultural society tor for that year it was about this time that agricultural experiment peri perl ment stations nere estabill esta established bIls bed and this gave opportunity tor for investigation and experimentation which in turn directed the attention of manufacturers rs of pumps to this now new demand for particular machinery then followed the improvement of spraying machinery and nozzles les and hero the french have helped us out greatly with their bordeaux mixture and nozzle prof F M webster |