Chloroform and r-7 rocket: what they have in common

1. Step 1. Chloroform — is used in — General anaesthesia. Chloroform.
2. Step 2. General anaesthesia — uses — Diethyl ether. Ether anaesthesia (Morton, 1846).
3. Step 3. Diethyl ether — is made of — Ethanol. Made from ethanol.
4. Step 4. Ethanol — is material for — V-2 rocket. The fuel is ethyl alcohol.
5. Step 5. V-2 rocket — evolved into — R-7 rocket. The Soviet rocket programme began by studying the V-2 (the R-1 was its copy).

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