Photo: Child that flies a kite with ZEISS logo. Robert Koch
Letter to Carl Zeiss,1904
Brief von Koch an Carl Zeiss
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Prof. Robert Koch
Privy Health Officer
Berlin W, 15, June 30, 1904

Dear Sir,

I still remember very well the first time I took an oil system into my hands and myself witnessed the dramatic progress achieved by the optical workshop of Carl Zeiss under the direction of Professor Abbe's ingenious advisory board. Every time I subsequently used oil systems, I thought with admiration and gratitude of the magnificent gift made by the Zeiss optical workshop to everyone working with a microscope. After all, I owe a large percentage of the success I have had the privilege of achieving for science to your excellent microscopes which were of enormous benefit to me in the expedition to South Africa which I have just completed.

Respectfully yours,

R. Koch

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