264 HEAT AND PROTOPLASM [Ch. VIII 



3. The temperature determinations, like the organisms, came from a Mrs. 

 Partz, who is vouched for as reliable. No details, concerning the method of 

 obtaining temperatures are, however, given. The springs form a basin from 

 ■which flows a creek. "In the basin," says Mrs. Partz, "are produced the 

 first forms [Nostoc] partly at a temperature of 121° to 135° Fahr. Gradually 

 in the creek, and to a distance of 100 yards from the spring, are developed, at a 

 temperature of 110"-120°Pahr., the algae," etc. 



4. Not seen by me. 



5. CoHN states : " Thermometerbeobachtungen zeigten in verschiedener Tem- 

 peratur des Wassers verschiedene, schon durch die Farbe erUennbare Arten ; 

 zwischen 43° und 35° R., die hellgriine Leptothrix, zwischen 35° und 25° die 

 Osciilarien, Mastichocladen, etc., gesellt mit Raderthieren, Infusorien und Was- 

 seralchen ; in noch abkUhlterem Wasser die farblose Hygrocrocis nivea ; Was- 

 ser iiber 44° enthalt keine lebenden Organismen. Ganz dasselbe fand Agardh 

 1827." 



6. No statement as to the method of determining temperature. The meas- 

 urements -were made in the outlet to a hot spring. In this outlet Hypeothi-yx 

 laminosa flourished at 68° and occurred at even a higher temperature. 



7. 'I'his account also leaves sometliing to be desired as to definiteness : 

 "Small springs rise at intervals of 10 to 20 feet along a distance of 30 to 40 

 rods. Their waters unite and form a little stream that empties into a brook a 

 short distance below. ... A dense mass of beautiful green confervse grew 

 about the bottom and sides of the channel, and floated in rich waving masses in 

 the hot water. In the immediate vicinity of the springs, however, no vegetable 

 growth appears. . . . The temperature of the hot stream, below all the springs, 

 was found to be 130°." 



8. Gkrvais' account is detailed, but the method employed in determining 

 temperature is not given. The principal sections of interest are as follows: 

 " Nous avons dit que I'eau au moment oil elle s'^ohappe des sources avait donn^ 

 k notre thermomfetre + 95° cent." [It cooks eggs, meat, beans, etc.] " II est 

 inutile de dire qu'on ne trouve en cet endroit aucun animal ne aucun v^g^tal 

 aquatique vivant. Cependant on voit courir sur les c6nes d'ou jaillit I'eau 

 bouillante, et en des points oil le pied ^prouve, m§me ^ travers lachaussure, un 

 sentiment de vive chaleur, de petites Araign^es qui m'ont paru §tre du genre 

 Lycose. Qutlques-unes s'aventurent mgme et oela sans inconvenient S, travers la 

 surface des pelits cratferes remplis d'eau chaude que presentent les cOnes dont il 

 s'agit. Dans la substance calcaire 6galemeiit fort chaude d'un de ces c6nes que 

 nous percions h coups de pioche pour en faire sortir I'eau bouillante par le flanc, 

 nous avons trouv6 plusieurs exemplaires vivants d'un petit CoMoptfere de le fa- 

 mille des Hydrophiles, V Hydrohius orbicularis, qui y avaient fix6 leur demeure. 



" L'eau i +95° qui sort de diff^rents points d'Hammam-Meskhoutin perd assez 

 rapidement cette temperature eiev^e. Elle n'a d^j^ plus que 57° dans les vas- 

 ques du second tiers de la cascade, dans lesquelles on commence S, trouver des 

 productions cryptogamiques. Celles-ci sont en partie couverles d'un enduit 

 ferrugineux assez ^pais." 



9. Plants found in samples of water from Taupo, "growing in water the 

 temperature of which varied from 105° F. to 131°." Two individuals are given 

 as occurring at "temp. 136°"; two at "temp. 116°." 



10. See note 2. 



