Page:Proceedings of the Royal Society of London Vol 69.djvu/109

Rh Curve II. Results at the three temperatures from 28 to 42 per cent, with intersection of lines at about 33 per cent. ; in the lowest curve the results slightly above and below 33 per cent, are represented on a short cross line.

690 680

670 660

650

640

63O

JL

$680 570 560

550 540 5SO 520 510

28 23 30

Percentages.