30 BULLETIN 586, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE 35.—Condition Record, March, 1917—Continued. 
Metal. a Location. Position. Condition, March, 1917. 
Station. ; 
Ungalvanized Bessemer steel-..-. 109 168+00 } South......... Considerably rusted and start- 
ing to scale slightly. Rust re- 
moved with effort, and de- 
terioration of metal noted to a 
small extent on scaled spots. 
DOF ce eee cee cen we eee eee 62 De ee nl fees ee ..-| Slight coating of rust, easily re- 
moved. No scale or deteriora- 
tion of metal noted. 
DOB emer abd ea Ce he 75 LT GSE ESO selsaacsisc ones : Do. 
Ungalvanized open-hearth steel. - 109 168+00 | North center..| Slight coating of rust, easily 
rioration of metal noted. 
1D Yo Bey Aree em CEN eS eh  b 110 112+50 | South........- Considerably rusted and starting 
to scale slightly. Rust re- 
moved with difficulty, and de- 
terioration of metal noted to a 
small extent on scaled spots. 
DO sccen cs cssaosteceseeeusee se 131 777+00 | North......-..] Considerably rusted. Coating 
removed only with effort. No 
sealing or deterioration of metal 
noted. 
Ungalvanized copper - bearing 98 HERAED | Sapaccsaseooones Slight coating of rust easily 
steel. dusted off. No scale or de- 
terioration of metal. 
DOs Bec esee eee eee eee asses 131 777+00 | South......... Considerably rusted. Coatingre- 
moved only with effort. No 
scaling or deterioration of metal 
noted. 
DD ON =o Seo tee ene ee asics eee 143 937-++00 |....- dos sseekke Considerably rusted. Coating 
easily removed. No scaling or 
deterioration of metal noted. 
Ungalvanized copper-bearingiron. 97 ATG AON EE A SOuCe see ee Slight coating of rust, easily 
dusted off. No scale or de- 
terioration of metal noted. 
ID eopases sie i oh saa. eine SIs 128 726+00 | North........- 0. 
DOS! La ae RIE SEE se 143 937+-00 | South center..} Considerably rusted. Coating 
easily removed. No scaling or 
deterioration of metal noted. 
Ungalvanized ingot iron.........-. 103 355+00 | Under con- Considerably, rusted and start- 
crete cross- ing to scale slightly. Rust re- 
ing. moved with effort, and de- 
terioration of metal noted to a 
small extent on scaled spots. 
AD Yo NS, et eee) OU ENS 148 10124 OOF Eee ees eee Reson Considerably rusted. oating 
of rust easily removed. No 
scaling or deterioration of 
metal noted. 
Ye eae 5 es Sh rie Aurea es 149 1018+00 } South........-. Considerably rusted. — Coating 
removed only with effort. No 
scale or deterioration of metal 
noted, but certain few spots 
indicate early formation of 
scale. 
SUPPLEMENTARY REPORTS OF EXPERIMENTS PREVIOUSLY 
REPORTED. 
The following reports are in continuation of others already pub- 
lished by the department in the annual ‘‘Progress Reports of 
Experiments in Dust Prevention and Road Preservation.” It was 
decided to abandon the experiments at Ames, Iowa, and Knoxville, 
Tenn., but the histories of these experiments as well as of several 
others are summarized with the supplementary reports, so that the © 
results obtained may be studied conveniently by those interested. 
In all cases references are made to the earlier publications in which 
reports regarding the various projects have appeared. 
