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ANNIVERSARY ADDRESS 
just a little farther. With the commencement of life we com¬ 
mence individual work; and the work of the infant heart, lungs, 
and muscles generally, as, for instance, in crying and screaming, 
involves an equivalent and prior assimilation of animal food. 
Thenceforward the infant must take enough food to enable it to 
perform such outside work as crawling on all fours, walking, 
grasping, clasping. Not until much later must it carry weights. 
The less constructive inside work the child or youth has to do as 
it advances in age, the more power will it have at disposal for 
other inside work, as, for example, the work of the brain during 
education; the more power, too, it will have at disposal for all 
outside work, whether at the workshop, the counter, or the tennis- 
lawn. Growth having ceased, a still larger proportion of brain 
and frame will be at the disposal of adults for work in the world 
outside themselves. In connection with the subject of the food 
we eat, nothing is more striking than this law of correlation 
between food and work. 
The law of the dependency of growth on food is only less 
striking than that just mentioned, because more familiar to us. So 
familiar, in fact, is this dependency of growth on the supply of food, 
from infancy to maturity, from birth to about twenty or twenty-one 
years of age, and so self-evident, that little need he urged in 
support of the law here, or of the inflexibility of the law. The 
child must absorb such mineral food as will provide for the 
growth of hone, such nutritious food as will provide for the 
growth of flesh, and such fuel-like food as will enable it to 
maintain the warmth of its daily increasing bulk. Something, 
however, must he stated respecting the kind of food necessary 
for the purpose, and on the quantity; stated at once concerning 
hone-forming food, and afterwards as regards flesh-forming and 
warmth-giving foods. Eone must grow by additions of bone- 
material, both animal and mineral, and that material must be 
supplied in the food swallowed—must be, for this is no matter 
of opinion, it is a matter of law. Eut if not supplied; what 
then? If the mineral material is, say accidentally or ignorantly, 
withheld ; what then ? The child will have, one cannot say 
bones, but bone-shaped things made of the flexible animal 
material, a material resembling gelatine, but it will not have 
true bones. These bone-shaped things, looking like real bones, but 
lacking the firmness communicated by the mineral material, will 
give way under the weight of the body; the child will be rickety. 
The child will have the “rickets”; a word equally expressive 
whether derived from the Greek or the Saxon; for if Greek it has 
