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Ueber die Bege Bewegungen der Faden der Spirogyra princeps —W. Hofmeister, Jahreshefte des Vereins für vaterländische Naturkunde in Württemberg 1874 p 211 (Commencement of a row of cells)

p 243 The filaments have the power of creeping (abt 25mm) up the sides of the vessel of water in which they are put or if kept in damp air by putting bell glass over the water they raise themselves into the air without the walls of the vessel

The filaments are 1/12 mm in thickness and if a single one is put in a porcelain vessel its movements can be followed and drawn with the naked eye.

p 216 The movements are very irregular, sometimes remaining quiet for 1/4 or 1/2 hr; The nutation was observed on a bit about 15mm long under a microscope: the rate of movement of the tip to the right or left was about 0.1mm in 5 min. In 2 1/2 hrs the filament moved 4 times to the left 3 times to the right

The whole observation last 4 1/2 hrs, & during that time he only mentions two movements in the other plane, once the filament moved up towards the observer & subsequently moved down again

[in margin:] 152 Keep for when I discuss [illeg]

p 218 The movements must be due to unequal growth in the membrane. There is no state of turgor and a cell does not become perceptibly shorter by making the protoplasm being made to contract

220 The movement of spirogyra seem to resemble the remarkable bending of that form the flower stem of that form of Allium sativum called Allium ophioscorodon

/over