Slide showing a chart of 'ALP growth: rats'. Slide shows a chart of 'ALP growth: rats'. 'X' and 'Y' axis are labelled in days (in 25s, from 0 to 200 - 'X' axis, from 0 to 400 - 'Y' axis). Chart has two curves, and there is a label on the chart, which reads: 'Curve of average growth of 38 female rats which were treated daily with intraperitoneal injection of the fluid from 2 grams of fresh bovine anterior hypophysis and that of 38 littermate sister controls (untreated) (first series: November 13, 1920 to May 9, 1921).' Label below chart reads: 'Fig. 42 - Curve (thick line) of average growth of 38 female rats which were treated daily with intraperitoneal injection of the fluid from 2 grams of fresh bovine anterior pituitary, contrasted with the curve (thin line) of the 38 untreated littermate sister controls. (From Evans, loc. cit.)'. Late 19th - early 20th century