Year: 1895

page_text: Date of Application, 14th May, 1895
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Complete Specification Left, 11th Feb., 1896-Accepted, 14th Mar., 1896
картотОЩОДО І
ISAAC SHIMWELL M°DOUGALL of 68 Port Street, Manchester, and JAMES
THOMAS MCDOUGALL of 10 Mark Lane, London E.C, triding as M'Dougall
Brothers, Manufacturing Chemists do hereby declare the nature of this invention
to be as follows:-
Hitherto, in coping with insect attacks on plant life in and out of doors the
remedies available have been applicable either in the form of washes or as
fumigants. In the case of washes it has been found that during droughts, or in
localities where water is with difficulty obtainable it is frequently impossible to
properly apply a solid or liquid remedy in the form of a wash over extended areas,
as for example in the hop garden. Fumigants are also open to the objection that
their cost and difficulty of application limit their usefulness to small outdoor areas
or to plants grown under glass.
After many experiments we have succeeded in preparing an insecticide in which
the active ingredients are thoroughly incorporated with finely powdered substances
as for example chemically precipitated sulphate of lime or equally suitable
substances or mixtures of them and the resulting damp powder is subsequently
dried at a low temperature in order to leave it in such a fine state of division that
it can be duectly applied to the infested plants by any of the machines in common
use, thus removing the objections above stated, and this is what we claim as our
ISAAC SHIMWELL M°DOUGALL.
JAMES T. MCDOUGALL.
ISAAC SHIMWELL M'DOUGALL of 68 Port Street, Manchester, and JAMES
THOMAS MCDOUGALL of 10 Mark Lane, London, E.C., trading as MºDougall
Brothers, Manufacturing Chemists, do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
Hitherto, in coping with insect attacks on plant life in and out of doors the
remedies available have been applicable either in the form of washes or as
fumigants. In the case of washes it has been found that during drought or in
localities where water is with difficulty obtainable, it is frequently impossible to
properly apply a solid or liquid remedy in the form of a wash over extended areas,
as for example in the hop garden.
To obviate the necessity of the addition of water before employing the
insecticides in the form of liquids or washes in a state of dilution we hud it a great
advai tage to thoroughly incorporate liquids containing the insecticules to be used
with any suitable absorbent substance in a fiue state of divisiION.
The resulting
most ponder is then subjected to a suitable temperature in order to render it into
a diy condition, convenient for applying over vegetable growths by the hand or by
means of scattering appliances.

page_text: The following are examples of the mixtures we employ :-
of tobacco
A { Precipitated sulphate of lime
Extract of tobacco
Extract of hellebore
B Lac sulphur
Dry soap
Kieselguhr
-
Arseniate of potash or soda (in solution) ·
Extract of quassia
Vegetable fibre (finely powdered)-
-
10 pounds
90 pounds
5 pounds
3 pounds
10 pounds
-
2 pounds
-
80 pounds
2 pounds
8 pounds
90 pounds
Having now particularly described and ascertained the nature of our said inveu
ion, and in what manner the saine is to be performed, we declare that what
ve claim is:
The combining of a liquid or liquids useful as insecticides with a suitable
absorbent powder or dier or any useful mixture of these and subsequent treatment
by evaporation in order to render tho mass containing the liquid or mixture of
iquids into a fit state for scattering over vegetable growths as insecticides iustead
of the liquids having to be applied after the addition of water in the form of
washes thus rendering a supply of water unnecessary in then application.
Dated this Eleventh day of February 1896.
ISAAC SHIMWELL MCDOUGALL.
JAMES T. MCDOUGALL.