18 BULLETIN 145, U. S. DEPARTMENT OF AGRICULTURE. 
Tasie 4.—Inflammabihty of treated wood. — 
Loss in 
Weight due 
o burning 
pee tae calculated 
tion (° €.) in per cent 
Sees | OLWwelgZ nt 
before 
7A. Tativ, i RAOg ignition. > 
ee Presery aly eudecenntes by co an Character of combustion. 
Days after Daveisca. 
aes aig soned— 
2 | 90 2 90 
Untreated wood (hemlock)....... S200 ae ee PAU crete Burned freely. 
t et bg ane a Coal-tar creosote. - 222.2222 22.2. 174 | 225 25 21 | Burned freely; black smoke; 
easily extinguished. 
ea Ae ee ois Coal-tar creosote, Fraction I....... 133 ; 306 23 33 putned ey freely; easily ex- 
inguished. 
viel aaa plete ee Coal-tar creosote, Fraction II..... 113 | 286 25 21 Butucd ately easily extin- 
guished, 
Qua eG Coal-tar creosote, Fraction III..--. 148 | 269 26 16 | Did not burn as well as ecreo- 
sote; easily extinguished. 
Bees oH Coal-tar creosote, Fraction IV...| 183 | 223 33 21} Burned freely; extinguished 
with difficulty. 
eens Giah Sat Coal-tar ecrecsote, Fraction V..... 195 | 287 10 15 | Ignited with difficulty; burned 
poorly; easily extinguished. 
Cee ae Water-gas-tar cresote, 1.051....... T720 eoL 24 19 | Did not burn freely; easily ex- 
tinguished. | 3 
ae Grewene ah Water-gas-tar creosote, 1.012...._. 149 | 238 29 18 | Burned Healy difficult to ex- 
tinguish. 
aerial Water-gas-tar creosote, 1.070...... 231 | 243 40 31 | Burned like Avenarius car- 
bolineum., 
aD e627 ath est CALDOlNnelmM =) eee see 243 | 263 26 19 | Burned like coal-tar creosote, 
but not so freely, 
i eee ee Avenarius carbolineum.....__.... 213 | 235 32 18 0. 
(eens C. A. wood preserver...........-- DAG | e947 33 35 | Burned like creosote. 
i Riser ates Hard wood tar tess see eee ee 190 | 241 29 30 Burned freely; dense black 
smoke. 
Tere Wood tar (Douglas fir)........... Ieee Palys 36 26 | Burned like coal-tar creosote. 
ieee Beechwood creosote............-- Lise |e ete 34 19 | Burned freely; black smoke; 
rathereasy toextinguish, 
TGR eso nn DS PALLG LINE aoe eee 194 | 247 37 29 | Burned freely; difficult to ex- 
tinguished. 
UY ieee aaa EPLESEGVO|erchee sao aaa eee eee ee 205! 269 23 22 | Did not burn as well as creo- 
sote; easily extinguished. 
hs Soe pe Wood-creosote oil... 22. 2).222..2 178 | 251 39 35 | Burned very freely; very diffi- 
cult to extinguish. 
Lt Eee Timberasphalt.... 0220.25. 2. sax] (2968105310 28 32 | Did not burn freely. . 
PE Ne ela ieee Coppenzediollie- = aa ee 200 | 228 43 33 | Burned like coal-tar cresote. 
J1 RS eg a Be il pe Fe ise. ete tas 167 | 241 36 27 | Burned very freely; very diffi- 
cult to extinguish. 
>A ls aan Pe Kerosene. payee sta etna aia 2) 126 | 231 37 17 Do. 
pS ee JAN OO NO BOC oS ae Se ee MOSHE As 8 Lene 19 | Hard toignite; burned poorly; 
easily extinguished. 
Aiea si aNhs 2 AATIC SSNPS Lee se ee sas anes 13 04 geen 18 Do. 
OH eras oie Zine sulphate (by-product)..._...]...... DDO S| trates Albee cee Do. 
ie oe, eae B= ME{pIeSerViabivet eae oo 2 Soa eee 1305 | aes 18 | More difficult to burn than 
zine chloride. 
Dele ne eens Sap woodiantisepbice sass =a eay cae |e es |e ne ae lesen 
DREN ee Sodiumysilicatews sre sie ee es oe SUA lecunce 10 | More difficult to burn than 
B. M. preservative. 
via! ele ea Es Sodium Muoride: <p S| ee USOSetE sees 25 | Burned like zine chloride. 
SO Nese ee @resol'calcium= = Gee ee | eee x Sha Wee gx ate 29 | Burned freely; white smoke; 
hard to extinguish. 
1 Woods treated with salts were ignited as soon as their moisture content was reduced by air-seasoning 
to 6 per cent, usually about 2 weeks after impregnation. For absorption of preservatives, see Table 3. 
2 See footnote 1, page 11. 
Note.—All saits burned for less than 3 minutes; all oils burned for 3 minutes and were then extinguished. 
