. Australian Garden and Field. 224 THE GARDEN AND FIELD. October. 1913 TURNER, ROBERTSON & CO., Electrical Engineers, Contractors and Suppliers. 126, 6RENFELL STREET, ADELAIDE (Basement of Robert Harper'*). EstimatcB Given Free for all Electrical Work. QUOTATIONS for BUILDEES and ARCHITECTS. Ring up Telephone No. 996 (). Mr. Turner, late Elevator and Motor Foreman, Messrs. Unbebaun & John- atone ; Chief Electrician Zino Corpor- ation, Broken Hill. 1216, GRBNEELL ST., ADELAIDE Some Aids to Agriculture. Ohne Phosphor kein Gedanke (Without phosphorus no thought) is a
. Australian Garden and Field. 224 THE GARDEN AND FIELD. October. 1913 TURNER, ROBERTSON & CO., Electrical Engineers, Contractors and Suppliers. 126, 6RENFELL STREET, ADELAIDE (Basement of Robert Harper'*). EstimatcB Given Free for all Electrical Work. QUOTATIONS for BUILDEES and ARCHITECTS. Ring up Telephone No. 996 (). Mr. Turner, late Elevator and Motor Foreman, Messrs. Unbebaun & John- atone ; Chief Electrician Zino Corpor- ation, Broken Hill. 1216, GRBNEELL ST., ADELAIDE Some Aids to Agriculture. Ohne Phosphor kein Gedanke (Without phosphorus no thought) is a German saying which may soi^md verv materialistic, but which nevertheless contains an element of truth. Phosphorus in one form or another enters very largelv into the composition of the human frame. Pones, brain, and nerves, with the healthful condition of them all depend upon the constant and sufTicient snpplv of this ele- ment of life. Our bones are largelv m'ade up of phosphate of lime, and if we reflect for a mo- ment I'jpon the prodigions quanti- tv of bonv •matter which is form- ed everv vear in a dense and ever- <rro\ving population, and realize that this matter is in one form or another derived from the soil, it becomes evident that to avoid the inevitable exhaustion of the land the amount abstracted from it must be replaced. Phosphoric acid constitutes nearly one half of the substance of the ash of wheat, and more than one-third of that of oats, or of barlev. does not occur in nature in a pure state. It is found combined with other substances, chit-H'- with lime, potash, and soda. Its combina- tions v^ath these are termwl phosphates. As phosphate of lime it is used in the manufac- ture of chemical manures. It is a si'ibstance larpelv diffused m the strata which form' the successive la\"ers of the earth's When this mineral has been mined f)r quarried it is ground to a fme powder and made soliuble hV the action of sulphuric aci
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