Single crystal of Tin(Sn) grown by the standard Bridgman-Stockbarger method was used in the study of phonon-drag effect in thermo-electricity in the range of temperature between 80$^\circ$K and 180$^\circ$K. Thermoelectric power was observed to be positive below 90$^\circ$K while negative above 90$^\circ$K. The observed themoelectric power S is represented by the relation $S(\muV/^\circK)= -8.0\times10^{-3}T+\frac{60.0}{T}$ in the temperature range studied. The two terms are interpreted as representing the diffusion thermoelectric power and the phonon drag themoelectric power respectively. From this interpretation of the present measurements in may be concluded that the phonon drag thermoelectric power of Tin varies as 1/T in the temperature range of $\frac{\Theta}{2}
Bridgman-Stockbarger Method를 사용하여 실험실에서 길른 단결정주석의 thermoelectric power를 $80\,^\circ\!K$에서 $180\,^\circ\!K$ 까지 넓은 온도 범위에서 측정하였으며 $90\,^\circ\!K$ 이하에서는 양의 값을 얻었고, $90\,^\circ\!K$ 이상에서는 음의 값을 얻었다. 위의 측정결과로부터 $S (\mu V\,^\circ\; K^{-1}) = -8.0 \times 10^{-3} T + \frac{60.0}{T}$ 의 실험식을 얻었다. 여기서 처음항은 electron diffusion thermo-electric power를 둘째항은 phonon drag thermoelectric power 를 나타낸다. 따라서 주석 (Sn) 에서는 phonon drag thermoelectric power, $S^g$가 Debye temperature를 $\theta$라 할때, $\frac{\theta}{2}
