THERE is probably no other art that is so encumbered with formulae as photography. Every maker of sensitive material seems to consider it his duty to supply his own particular formulæ for its use, and ...

PROF. E. W. COUNT 1 has recently examined the various formulæ which have been suggested for expressing the relationship between brain-weight and body-weight in vertebrates, and has also introduced a ...

The questions in this quiz are suitable for GCSE maths students studying formulae, substitution, creating formulae, changing the subject of a formula, rearranging formulae - higher and function ...

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