422 The Philippine Journal of Science 1920 
cept in the instances where none such were obtainable, or where 
superior ones were found in the publications of other writers. 
Acknowledgment has naturally been made in every case. 
Throughout the text-book the metric and the English systems 
of measurements have been used together, putting in paren- 
theses in the terms of one the equivalents in the other. The 
statistics quoted from any author have been given in the system 
employed by him, and the corresponding figures in the other 
then placed in parentheses. The equivalent values are largely 
those found in the tables of the United States Pharmacopoeia. 
Ounces are respectively avoirdupois or liquid measure, except 
in designating the doses of solid medicaments, when Troy ounces 
are used. Fractional amounts in grains, drams, cubic milli- 
meters, cubic centimeters, and grams are omitted unless the 
quantities are small. Grams are assumed to be the equivalent 
of cubic centimeters, ignoring the specific gravity of many 
liquids, where the figures as given would not be absolutely cor- 
rect. In the parentheses the abbreviations designating grams 
and cubic centimeters are omitted, the sense of the text making 
them unnecessary. An exception to the employment of both 
systems of measurement will be found in discussing the prep- 
aration of food in the artificial feeding of infants. Here only 
English measures are given, since the preparation must be 
made in conjunction with the graduated nursing-bottles and the 
liquid measures in common household use. 
Numerous cross-references will be found throughout the work, 
thus calling attention to discussions of the subjects on other 
pages, which would otherwise be overlooked unless the index 
were consulted. Although every effort has been made to avoid 
inaccuracy of statements, and particularly of references, the 
author must expect to share the experience of others, that these 
will creep in to some extent. 
The author has waived his own preferences in the matter, 
yielding to the desire of the publishers for uniformity in the 
system of spelling and of punctuation adopted throughout the 
numerous works upon medical subjects published by them. 
The | Medical Clinics | of | North America ] November, 1919 | published bi- 
monthly by | W. B. Saunders Company | Philadelphia and London 
| Paper, pp. 551-847, $12 per clinic year; cloth, $16. 
The Mayo Clinic Number, Volume III, No. 3, contains the 
following papers: 
Report of a case of retinitis circinata associated with tuberculosis, 
by W. L. Benedict. 
