﻿CONTENTS 
  

   Original 
  Papers 
  

  

  Page 
  

  

  Physics. 
  — 
  Temperature 
  changes 
  accompanying 
  isentropic, 
  isenergic, 
  and 
  isenkaumic 
  

  

  expansion. 
  Leason 
  H. 
  Adams 
  407 
  

  

  Physics. 
  — 
  Some 
  observations 
  on 
  the 
  transformation 
  of 
  thermal 
  radiant 
  energy 
  into 
  

  

  electric 
  current 
  in 
  molybdenite. 
  W. 
  W. 
  Cobi^ENTZ 
  411 
  

  

  Physics. 
  — 
  A 
  device 
  for 
  recording 
  electric 
  contact 
  using 
  an 
  electron 
  tube 
  generator 
  and 
  

  

  a 
  radio- 
  frequency 
  spark. 
  Charles 
  T. 
  Zahn 
  412 
  

  

  Zoology. 
  — 
  A 
  new 
  species 
  of 
  Nygolaimus, 
  an 
  outstanding 
  genus 
  of 
  the 
  Dorylairaidae. 
  

  

  N. 
  A. 
  Cobb 
  416 
  

  

  Proceedings 
  

  

  Botanical 
  Society 
  421 
  

  

  OFFICERS 
  OF 
  THE 
  ACADEMY 
  

   President: 
  W. 
  J. 
  Humphreys, 
  Weather 
  Bureau, 
  

   Corresponding 
  Secretary: 
  Francis 
  B. 
  Silsbee, 
  Bureau 
  of 
  Standards. 
  

   Recording 
  Secretary: 
  William 
  R. 
  Maxon, 
  National 
  Museum. 
  

   Treasurer: 
  R. 
  L. 
  Faris, 
  Coast 
  and 
  Geodetic 
  Survey. 
  

  

  