4.60 Oren E. Frazee 
contact with the terminals for ten seconds. Upon the following 
day this stimulation was repeated with the same six. Six days 
after the operation and three and two days after stimulations, 
measurements were taken which showed a slight advantage in the 
stimulated set. The following table shows amounts of regenera- 
tion in the six days for each tadpole: 
TABLE I 
Stimulated Non-stimulated 
mm mm 
Revd Ousyeicrs see echenceais Mietec e omapacroe 0.40 Wars Sat Rtartecale eoareTeLveusisoaet te ebeTae OPO 0.40 
Nicos do pGH ROSUROE ABSA eo abon tee 0.36 houcicnee Ducts LARS ONAGd So,0l5n x 0.36 
Glaitlo ol dalirsan Sr chrie DREe crad eer 0.48 Qisldtaiaeaerscvaieva gocher tet pens traeers 0.36 
CA roves Stalls a oy |=toi2 Me ye wha Sines tS. eee ras ots 0.52 TOn siamo aerate’ piss telethon 0.48 
Subbu. ca dance Teepeantia nae eaiae 0.52 itl Ran orewadone Gowrie Coo SoduC 0.52 
Obi al tae siaruess aeateteirerstaie ic dievacerers 0.52 1 RCTS TORE Mate Sid oF 0.52 
HAVEL AIR Ohy. coavarete fafa letesstat ere ekcteree craton 0.466+ AN ELAR Scitarofo.clraetre reheat 0.44+ 
Experiment 2. In this experiment 20 tadpoles of Rana pipiens 
were taken. They ranged from 25 mm. to 28 mm. in length. 
They were operated upon October 22, 1908, when 10 mm. of 
the tail of each were removed. ‘The following day 10 of the 20 
were stimulated with the current from an electric lighting wire, 
voltage 110. The entire current was run through a small tank 
of water in which the tadpoles were placed for five minutes. None 
of the tadpoles survived the shock of the current. No measure- 
ment of the current was secured. 
Experiment 3. In this experiment the 20 tadpoles of Rana 
pipiens which were selected, ranged from 29 to 35 mm. in length. 
November 16, 1908, 10 mm. of the tail of each were removed. 
The following day half of the tadpoles were charged with a cur- 
rent from the electric lighting wire, with a 16 c. p. lamp as resist- 
ance thrown in circuit, for ten minutes. Voltage, 110. The 
small tank of water mentioned in No. 2 and described above 
was used. At the end of ten minutes, 5 of the 10 had been 
killed and the remaining 5 died within a few hours after their 
removal to the dishes. No measurement of the current was 
secured. 
