620 PROCEEDINGS OF SECTION I. 



(c) Before removing tape, mark with a coloured pencil the level at which the 



measvu'ements have been taken. 



(d) If the finger be passed from the supra-sternal notch downwards over the 



front of the sternum or breast-bone, it soon meets a projecting ridge 

 crossing the bone transversely. This gives the level of the second 

 costal cartilage, and taking it as the starting point, the fourth costal 

 cartilage, ^^"here it joms the stei'num, can easily be determmed. In 

 al 1 cases the measurements are to be given to the nearest J inch or 

 nontimetre. 

 In measuring the che.st diameters with callipers, the following directions should 

 be observed : — 



(a) For the antero-posterior diameter measure from mid-line in front to 

 mid-line beliind (sternum to spine of dorsal vertebrse) at the level of 

 the coloured line previously marked. 

 (6) For the lateral diameter take the maximum measurement found ^\'ith the 

 callipers held hoi-izontally, Mith the blades tangential to side of chest 

 at the level of the coloured Ime before mentioned. 

 Both diameters should be mefisiu-ed. 



(i) in deep iaspiration (max.); . 

 (ii) in complete expiration (min.) ; 

 and all measurements .should be recorded to the nearest J inch. 



In using the spirometer the inspiration should be as deep as possible, the 

 complete expiration being into the spii'ometer. The maximum result of three 

 trials should be given. 



(iii) The Tabtjlation Sheet. 



Instruction for the Tabulation of Data concerning Heights and Weights in 

 conjunction with Age. 



1. After each series of measurements has been completed, sort out the cards 



relating to pupils who have not participated. 



2. Sort the remaining cards into two groups, one for each sex, if the cards are 

 not already in such order. 



3. Next sort each sex-group for ages, grouping cards for children in the same 

 half-year of age. For this purpose group, for example, ages marked 6.3, 6.4, 6.5, 

 6.6, 6.7, and 6.8 together, and tabulate as " Central age, 6^ " ; group agea 

 6.9, 6.10, 6.11, 7.0, 7.1, and 7.2 together, and tabulate as central age 7, and so on. 



[4. All particulars of height and weight in conjunction relatmg to each sex for 

 each half-yearly " central age " must be tabulated on a separate tabulation sheet.] 



5. Divide all cards in each half-yearly age group mto groups according to each 

 half inch of height, as shown in the upper margm of the tabulation sheet. 



6. Sort the cards for each height, according to weights in lbs., as indicated in 

 the left-hand margin of the table. 



7. Count the number of cards for each height and weight, and enter this 

 number in the appropriate space on the tabic for that particular half-yearly age. 



8. Add the recorded numbers in each table both horizontally and vertically, 

 testing the accuracy of the additions by ascertaming that the horizontal addition 

 of the totals of the column agrees with the vertical addition of the totals of the 

 ]ines. 



9. The information for the space marked " Height Products " is to be obtained 

 by multiplying the total number of children at the foot of each column by the 

 height showji at the head of such column. 



