Care must be taken not to underwater houseplants in the summer.

Of course, when we speak in broadly evolutionary terms, to do so need not imply the simplistic notion of unilineal evolution, with the suggestion that human developments always follow the same sequential pattern.

Her ladyship will be unable to attend tonight, he said, with a wink because he hadn't said why.

The R.M.S. value of the pressure was taken from the oscillogram by taking the square root of the average value of the squares of a number of equi-distant ordinates; the R.M.S. value of the current was obtained in the same way from the current oscillogram, and the two values multiplied together always gave a value agreeing to within 1 per cent. of that obtained by first multiplying the ordinates taken from the current and voltage oscillograms and then taking the mean.