File:Florists' review (microform) (16057617643).jpg

Title: Florists' review (microform)
Identifier: 5205536_16_1 (find matches)
Year: [1] (s)
Authors:
Subjects: Floriculture
Publisher: Chicago : Florists' Pub. Co
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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• ;-7»i'l^T^r/ "T^^^^.'-T-'T^wiji f J^ujWMUJJUfWfi'V^'lilw.W'P "WllWtlfljPpf ■'w?r' ▼ 136 The Weekly Florists^ Review* June 8, 1906. in lacking acetic acid; in other words, it is the simple arsenite of copper. It, is a much finer powder than Paris green, and therefore more easily kept in suspen- sion, and has the additional advantage of costing only about half as much per pound. : When properly washed and pre- pared by the manufacturers it is no more harmful to foliage than Paris green when the latter is brought to an equal fineness, is quicber in effect, and should supplant the latter as an insecticide. It is used in the same way and at about the same strength, as Paris green and London pur- ple. Arsenite of lime, following substan- tially tlie Kedzie formula, is prepared by the aia of soda as follows: White arse- nic, one pound; sal soda crystals, four pounds; water, one gallon. BoU the arsenic and sal soda in the water for twenty minutes, or until dissolved. Add enough water to make up for the, loss by evaporation. This stock mixture will keep indefinitely. For ordinary spraying operations add one pint of the stock mix- ture to forty gallons of water, in which has been previously mixed about three pounds of freshly slaked lime. Chemi- cally, this arsenical is arsenite of lime. The soda is used to hasten the process and to insure the combination of all the arsenic with the lime. The greatest care should be exercised in preparing the stock mixture, and afterwards in keep- ing it plainly labeled to prevent its being mistaken for some other substance. In actual practice the arsenite of lime has proven as effective as the older arsenical compounds. Its cost is very inconsider- able, which, with its proven effectiveness, is its chief recommendation. The objec- tions to it are the necessity of handling poisons in its home preparation and its color. London purple is a waste product in the manufacture of aniline dyes, and contains a number of substances, chief of which are white arsenic and lime. It is not so effective as the green poisons, and is much more apt to scald unless mixed with lime. It comes as a very fine pow- der, and is more easily kept in suspension than Paris green. It costs about 10 cents a pound. Arsenate of lead is prepared by com- bining, approximately, three parts of the crystallized arsenate of soda with seven parts of the crystallized acetate of lead (white sugar of lead) in water. These substances when pulverized unite readily and form a white precipitate, which is more easily kept suspended in water than any of the other poisons. Arsenate of lead may be used at any strength from three to fifteen pounds to 100 gallons of water without injury to the foliage, and in this respect is much safer on delicate plants than any other arsenical. The combined weights of the two ingredients are here meant rather than of the resulting lead arsenate, which will be somewhat less. Its use is advised where excessive strengths are de- sirable or with delicate plants where scalding is otherwise liable to result. With this insecticide there is an advan- tage in using the freshly prepared and wet mixture in that it gives a more filmy and adhering coating to foliage, the same fineness not being secured when it has been dried and repulverized. In point of solubility and correspond- ing danger of scalding the foliage these arsenicals fall in the following order, the least soluble first: Arsenate of lead, arsenite of lime, Paris green, copper ar-
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John H. Dunlop. senite, and London purple. The differ- ence between the first four is not great in the particulars noted nor in point of effectiveness against larvae or other in- sects. London purple is ordinarily con- siderably less effective. JOHN H. DUNLOP. The largest greenhouse establishment in the Dominion of Canada, and one of the largest in America, is that of John H. Dunlop, of Toronto. As is the case with all of the older establishments, this one grew from a very small beginning, slowly at first, keeping in step with the development of the demand for green- house products. Mr. Dunlop was born in 1855, in New York, but his family re- moved to Toronto in the early 60 *s. The boy was not content until he had roamed a bit, but Jn 1875 he settled down in that city. It was five or six years later that he built his first greenhouse, the embryo of the present enormous establishment. It was added to year by year as space was required, for the business grew steadily, even faster than the normal de- velopment of our industry, for Mr. Dun- lop has always been a producer of that grade of goods which causes the buyer to seek the source of supply. An old phil- osopher once said something to the effect that if one sets up his dwelling in the wilderness and produces a better article than can be had elsewhere, the buyers will beat a pathway to his door. Mr. Dunlop has endeavored to act on that line of reasoning. The early houses in this establishment were of most crude construction but, as years have gone by, every nsw idea ha» been given a trial and Mr. Dunlop ha» said of his place that in no other estab- lishment in America have so many styles of greenhouses been built. He says that his preference is for the modern, high, light, connected houses but that it is his experience that, given a good enough grower, the stock will be all right what- ever the style of greenhouse. Mr. Dunlop was a pionesr in the forc- ing of lily of the valley in Csinada and he has also led the way in the culture of roses and carnations. Even in the face of the tariff charge, Mr. Dunlop's roses steadily find their way to several of the principal cities south of the great lakes. Mr. Dunlop has traveled widely in hi» efforts to keep pace with the floriculture procession and has visited most of the well known establishments in the United States. He is active in society matters and was for a term president of the Ca- nadian Horticultural Society. At the last meeting of the Carnation Society he was the spokesman for Canada in its in- vitation for the society to cross the line, as it has practicaly pledged itself to da in 1907. Please stop our advertisement of mums and geraniums; all sold.—A. Rel- YEA & Son, Poughkeepsie, N. Y. Put a neat sign in your window: Fu- neral or gift flowers delivered by tele- graph anywhere in the United States. "^ When you have taken an order refer to the page of "Leading Ketail Florists" in the Review and select a man to whom to telegraph the order. You will flnd it a very satisfactory source of business.

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