| Show discoveries OF GREAT VALUE chemists Chernis ts have at last pound found secret ot of makinia fertilizer from nitrogen 0 gen of air how it rs Is done by CHAS C nn chemists have at last discovered the secret of making fertilizer from the nitrogen of the air repeated efforts to recover free nitrogen has baffled scientists for yeara but both italy and germany now have factories for malting making cyanide or cil cal clum a P combination of nitrogen and chalk or lime the principal difficulty heretofore has bos been to secure a chemical cheap enough for or commercial purposes which would surrender its nitrogen readily so it would be suitable tor for agricultural purposes nitrogen has a strong affinity for lime this tact fact Is taken advantage of by chemists in making the fertilizer air Is iq passed over chemically treated limestone and the nitrogen Is imprisoned while the oxygen and other elements escape the limestone which has be been treated with chemicals Is heated in retorts electricity being used to liber ate the nitrogen from the air in combination with carbon nitrogen forms the or cyan cyanide ide which is so deadly in combination with certain minerals it was formerly extracted from hoofs and ot other her nitrogenous principles but in the natural state it Is found in peach stones atones bitter almonds and other nuts which owe their flavor to this principle |
