and Laboratory Methods. 



2385 



in chains Streptococci (Fig. 12,''), in fours Tetracocci (Fig. 12,-*), and in groups of 

 eight, sixteen, etc., i. e., growing in three dimensions producing packets, they 

 are termed Sarcitue (Fig. 12,"'). 



The piece of potato inoculated with dirt will undoubtedly show colonies of 

 rod shaped bacteria. Some of these may be narrow with pointed ends (Fig. 



Fig. 13. — -Diagram illustrating form and cell grouping among the rod shaped bacteria. 



13,1), others shorter with rounded ends (Fig. 13, 2), others have square ends 

 (Fig. 13,^). Not infrequently the rod shaped bacteria remain attached, end to 

 end, forming threads (Fig. 13,"*). The spiral forms are not likely to be repre- 

 sented on the potato cultures. They are sometimes found in the tartar from 



Fig. 14. — Diagram illustrating form and cell grouping among the spiral shaped bacteria. 1, 

 Microspira ; 2, Spirillum ; 3, Spirochaeta. 



the teeth, and may also be found in water from a bouquet, or in a hay infusion. 

 This is easily prepared as follows : Place a small handful of hay or straw in a 

 barrel, cover it with water and place in a warm place for a day or two. 



The three typical forms are the slightly bent rod, or Microspira (Fig. 14, i), 

 the double bent rod, or Spirillum (Fig. 14, 2), and the long spiral form, or Spiro- 

 chceta (Fig. 14,='). W. D. Frost, 



University of Wisconsin. E. G. HASTINGS. 



The Lake Laboratory of the University of Montana will open on July 13 

 and will continue for five weeks, after which opportunity will be given for re- 

 search work. The field laboratory is located on the bank of Swan river at its 

 outlet into Flathead lake. This location affords a harbor for boats and a 

 camping site for the tents of those attending. The adjacent region contains 

 forests, ponds, lakes, swamps, cultivated fields, mountains, rivers, and ravines. 

 It is rich in animal and vegetable life. The lake offers opportunities for col- 

 lecting, and presents some beautiful scenery. East of the lake the Mission 

 range comes abruptly to the water's edge. West of the lake are the Cabinets. 

 Near the station Swan lake, Rost lake, Echo lake, and other waters, are easily 

 accessible. Daphnia pond, a few minutes' walk from the station, is rich in 

 pond life, while Estey's pond, about as far again, is fully as productive. The 

 Swan range is easily accessible from the station, and Alpine summits are 

 annually visited. The station is not difficult of access. The stage and boat 

 rides are easy, with charming scenery constantly in view. The building is a 

 convenient out-door laboratory, with tables for a dozen students. The station 

 work has entirely outgrown the building. Many of the lectures are given out of 

 doors in the yard, and the fine summer weather permits of much laboratory 

 work out of doors. Information may be obtained from Prof. Morton J. Elrod, 

 director of the station. University of Montana, Missoula, Mont. 



