Repository: UIHistories Project: Booklet - Addresses from Inauguration of Noyes [PAGE 58]

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67

they attempted to make stool by th new method, however, every one of them failed*

It was found practically Impo sible to Htop

the blow at tli right point, to secure a uniform product Bui Bessemer was Dot disheartened by the Failure and for the two

y irs and a half following he worked continuously, building new furnaces and tearing them down, until he finally solved the i lifficulty. It was found possible to determine when the burning out of the carbon in the iron was practically complete by watching the flame as it issued from the converter. Then, by adding the right amount of an iron containing manganese and carbon, the proper composition for si 1 could be secured. When Bessemer tried again to introduce his perfected process he met with a very cold reception from the manufacturers. They said they were not to be deceived a second time. lie wa.s finally compelled to build works and establish the manufacture for himself. He succeeded beyond the most sanguine expectations, and the revolution in the manufacture of steel which dates from that time is common knowledge. Agriculture still remains the most important industry in the world. From the time thai primitive man began to till the soil to the middle of the nineteenth century the former received but little aid from

Chemistry. The work or the last, s e v e n t y

years has changed all that. As late as 1840 if was generally supposed that plants

J chiefly from the Vegetable h u m u s in h e soil. Many of the fundamental i';\c\<; ^ h i c h to ha: a more correct view had on

i

i ,muMi loner before, but il was Liebiff