Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man. ...

If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man. (Peter Singer)

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Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.

Peter Singer Quotes: If penicillin had been judged by its toxicity to guinea pigs, it might never have been used by man.