. The American journal of tropical medicine. d, 25th, and27th. In chart II there is a tendency for the first crest to occurevery other day at 21 oclock (9 ) on the 24th, 26th, and second crest tends to occur every other day from 12 to 15oclock on the 25th, 27th, and 29th. The second trough is wider than the first and serves to marktertian periodicity, for the lowermost point of this trough cor-responds with a certain hour every other day. It must be noted that while there is a tendency for all the firstcrests to synchronize with one another they do not synchronizewith the second c
. The American journal of tropical medicine. d, 25th, and27th. In chart II there is a tendency for the first crest to occurevery other day at 21 oclock (9 ) on the 24th, 26th, and second crest tends to occur every other day from 12 to 15oclock on the 25th, 27th, and 29th. The second trough is wider than the first and serves to marktertian periodicity, for the lowermost point of this trough cor-responds with a certain hour every other day. It must be noted that while there is a tendency for all the firstcrests to synchronize with one another they do not synchronizewith the second crests. First and second crests are usuallyquite independent of each other in the hours of their occurrence. One of the minor shocks experienced by students of malariais that sporulation and temperature do not always correspondwith text book schedules; they do not always promptly occur atintervals of 24, 48, and 72 hours. In practice one observes agood deal of acceleration or anticipation and retardation. QUOTIDIAN AESTIVO-AUTUMNAL FEVER 401. > -u 03 u rri rG m o 3o ^ to -O +2 >> o ojo ir iL Oi 03 C o3 o53 Z A t^ O H - § a> K- CO tH 03 O °5 OT aj I - § ^ -d -g cs a CI 402 SAMUEL T. DARLING In subject 3 the occurrence of three events was as follows: FIRST CREST 16th day 23 oclock18 day21 oclock20 day 19 oclock22nd day 15 oclock (quinine) SECOND CBEST 17th day 18 oclock19 day 18 oclock21st day 18 oclock23rd day 18 oclock (quinine) SECOND TROUGH 18th day 9 oclock20 day 8 oclock22nd day 8 oclock24th daj- 8 oclock In subject 3 while the second crest remains fixed at 18 oclockthe first crest occurs earlier on each successive alternate acceleration of the time of occurence of the first crest in-creases the width of the gap between the first and second crestand gives the graph a more distinct quotidian appearance. The three events in subject 1: FIRST CREST 15th day 18 oclock17 day 16 oclock19 day 13 oclock (quin-ine) SECOND CBEST 16th day 16 oclock18 day 19 o
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttropica, bookyear1921
