PREFACE.

The first edition of 1884 contained but 5 pages of type; the second of

1898, 14 pages. Only by conciseness has it been possible to give even a

summary of the principles of dietetics within the limit or this pamphlet.

Should there appear in places an abruptness or incompleteness of

treatment, these limitations must be my excuse.

Those who wish to thoroughly study the science of food are referred to the

standard work, "Food and Dietetics," by Dr. R. Hutchison (E. Arnold,

16s.). The effects of purin bodies in producing illness has been patiently

and thoroughly worked out by Dr. Alexander Haig. Students are referred to

his "Uric Acid, an epitome of the subject" (J. & A. Churchhill, 1904,

2s.6d.), or to his larger work on "Uric Acid." An able scientific summary

of investigations on purins, their chemical and pathological properties,

and the quantities in foods will be found in "The Purin Bodies of Food

Stuffs," by Dr. I. Walker Hall (Sherratt & Hughes, Manchester, 1903,

4s.6d.). The U.S. Department of Agriculture has made a large number of

elaborate researches on food and nutrition. My thanks are due to Mr.

Albert Broadbent, the Secretary of the Vegetarian Society, for placing

some of their bulletins in my hands, and for suggestions and help. He has

also written several useful popular booklets on food of a very practical

character, at from a penny to threepence each.

Popular literature abounds in unsound statements on food. It is

unfortunate that many ardent workers in the cause of health are lacking

in scientific knowledge, especially of physiology and chemistry. By their

immature and sweeping statements from the platform and press, they often

bring discredit on a good cause. Matters of health must be primarily based

on experience and we must bear in mind that each person can at the most

have full knowledge of himself alone, and to a less degree of his family

and intimates. The general rules of health are applicable to all alike,

but not in their details. Owing to individual imperfections of

constitution, difference of temperament and environment, there is danger

when one man attempts to measure others by his own standard.

For the opinions here expressed I only must be held responsible, and not

the Society publishing the pamphlet.

Vegetarians, generally, place the humane as the highest reason for their

practice, though the determining cause of the change from a flesh diet has

been in most cases bad health.

A vegetarian may be defined as one who abstains from all animals as food.

The term animal is used in its proper scientific sense (comprising

insects, molluscs, crustaceans, fish, etc.). Animal products are not

excluded, though they are not considered really necessary. They are

looked upon as a great convenience, whilst free from nearly all the

objections appertaining to flesh food.

The Chemistry of Food and Nutrition · 第 2 / 6 题