## Tools for Thought |

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Page 33

By the time there were enough of them to form a representative sample, they also

in number every fifteen years, and reaching a total of 1,900 by the mid 1960s.

By the time there were enough of them to form a representative sample, they also

**started**to multiply, at the same exponential rate as the primary journals, doublingin number every fifteen years, and reaching a total of 1,900 by the mid 1960s.

Page 45

This way of representing the result is sometimes spoken of as a “grass-fire': it is

what would happen if one

along the symmetry axis and more slowly outwards until it met some other ...

This way of representing the result is sometimes spoken of as a “grass-fire': it is

what would happen if one

**started**a fire in a field of dry grass, which spread fasteralong the symmetry axis and more slowly outwards until it met some other ...

Page 125

This was very obvious in the science with which I

-third millimetre across) out of one embryo newt or chick and placing them, to fit,

into a prepared hole in another embryo. What I first prided myself on, as a ...

This was very obvious in the science with which I

**started**, cutting little pieces (one-third millimetre across) out of one embryo newt or chick and placing them, to fit,

into a prepared hole in another embryo. What I first prided myself on, as a ...

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