Year: 1888

page_text: Date of Application, 4th July, 1888
Complete Specification Left, 13th Aug., 1888
Complete Specification Accepted, 21st Sept., 1888
1, BERNARD PIFFARD, Hill House, Hemel Hempstead, in the County of Herts,
Gentleman, do hereby declare the nature of this invention to be as follows :-
Agricultural manures are usually compounded so as to exhaust the land, by
stimulating the cereal crops to absorb the nutrient of the soil.
By my invention, a different effect is produced; I supply a substance without
which a pre-existing superabundance of nutrient matter fails to be utilised I manu-
facture a manure containing free silicic acid in such a form that its natural assimilation
is facilitated. I am aware that it has been proposed to use soluble silicates as manure
but these are difficult to apply. Moreover my silicates are formed by the action of
the soil, air and rain.
According to my invention I use flints, chert (or chertz) gravel, sand, quartz and
all other silicious materials in a crushed or finely pulverised state and add thereto
in certain proportions the following substances, Lime, or Hydrate or Chloride of
Lime, or Carbonate of Lime or other alkaline Carbonates or sulphates preferably
in the proportion of three of the silicious material to one of the other materials.
I prefer to add a small percentage of lanp black which serves as a test to show
whether the other ingredients have been thoroughly mixed together which is the
case when the whole is a powder of a uniform grey color.
•

page_text: I, BERNARD PIFFARD, Hill House, Hemel Hempstead, in the County of Herts,
Gentleman, 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 :—
Agricultural manures are usually compounded so as to exhaust the land, by
stimulating the cereal crops to absorb the nutrient of the soil.
By my invention, a different effect is prodneed ; 1 supply a substance without which
a pre-existing superabundance of nutrient matter fails to be utilised I manufacture a
manure containing tree silicic acid in such a form that its natural assimilation is
facilitated. I am aware that it has been proposed to use soluble silicates as manure
but these are difficult to apply. Moreover my silicates are formed by the action of
the soil, air and rain.
According to my invention I use flints, chert (or chertz), gravel, sand, quartz and
all other silicious_materials in a crushed or finely pulverised state and add thereto
in certain proportions the following substances,Lime, or Hydrate or Chloride of
Line, or Carbonate of Lime or other alkaline Carbonates or sulphates preferably in
the proportion of three of the silicious material to one of the other materials.
I prefer to add a small percentage of lamp black which serves as a test to show
whether the other ingredients have been thoroughly mixed together which is the rasa
when the whole is a powder of a uniform grey color.
I prefer to employ flints and to crush and pulverise them with an edge runner and
then separating the finely pulverised flint by means of an aspirator returning the
rough to be completely pulverised.
I then dry and grind chalk and mix it with the flint in the proportion of 66 of
Hint and 38 of chalk,
To this mixture about 2% of lamp black is added this mixture is intimately mixed
until it assumes a uniform grey colour this being the test of thorough mixing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :- ·
1. A manure consisting of a mixture of flints or chert (or chertz), or gravel, or
sand, or quartz, or any other silicious material in a crushed or finely pulverised state
with lime, or hydrate or chloride of lime, or carbonate of lime or other alkaline
carbonates or sulphates substantially as described.
2. The addition of a small percentage of lamp black substantially as described.