220 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1909. 
(2) That the characteristic properties and constants to be deter- 
mined, account being taken in each case of the degree of humidity, 
shall be the following: 
The density to be employed. 
The coefficient of conductibility. 
The resistance to flexure. 
The resistance to crushing. 
The power of expelling water. 
The power of absorbing odors. 
The incombustibility. 
These constants should be determined under conditions of tem- 
perature and thickness of material applicable to the refrigerating 
industry. 
(3) That the second section shall call especial attention to the study 
of the conductibility as a function of temperature, thickness, degree 
of humidity, and of other causes capable of influencing the conducti- 
bility ; for example, the state of division of the material necessary to 
assure a certain insulation. 
(4) That the section requests that the International Bureau of the 
Refrigeration Congresses, the organization of which has been 
planned, shall constitute an international commission charged with 
taking up the study of methods of testing, and cordinating, with a 
view to establishing methods and obtaining comparable results, any 
researches which are made, in which otherwise the investigators 
would have their usual latitude. 
(5) That it shall be of interest to submit the question of the uni- 
formization of such methods to the next congress if the researches 
concerned are sufficiently advanced. 
Official instruction up to the present time has been somewhat 
neglectful of the refrigerating industry. The present-day develop- 
ments of this industry renders more and more necessary the educa- 
tion of engineers who are specialists in this line. For this reason the 
second section has also taken the following resolutions: 
(1) That theoretical and professional instruction, applied to 
different present-day phases of the industry of refrigeration and 
with a view to-new applications, shall be inaugurated in the labora- 
tories and higher technical schools of all countries, this course of in- 
struction to be followed by detailed practical study of important 
refrigerating establishments and rational experimentation with the 
machinery there used, under the direction of specialists. 
(2) That in order that the necessary scientific equipment and ex- 
perimental material and the cost of the experiments may be pro- 
vided for, this instruction should be subsidized by the governments, 
municipalities, chambers of commerce, industrial societies, agricul- 
