- l
Il
C(lN'1`I·INTS V $1
$.1
ILLUSTRATIONS  
Flu. Page  
1. t>il firm-s can ho prt·vt-ntcrl by storing oil in clvan. tl
il1`t‘1>1'U()I'· stnraaei l1<¤ns<~s, ,,, ,,,,,, __._,,,,,,, ,, KKK. E1 Q
2. .\tlt·t;natt· [)I`(‘('l111llt111S will pruvcnt accidents fmnu I
falls along liaulagtr roads ,,__,,_._,_____ _ _,,,,,, 1] P
3. 'l`ln» vibration invtliml should bc cmploycd f0r testing; f_
rmnt`. and the roof slioul l lm tcstncd often _....__ ,, , ,, 17  
4, A rloiinitv tiinlwring plan slionlcl bc adopted; inincrs {
slmnlrl ho inarlu tliumtiglily familiar with it and ’
SI1t)1lI(II'(1IlU\\` it carctnlly ,,,,, , _, _, ,__,__,,___.. . 21 `
5. t\(I(‘([II2Ll(* lIl11l)(‘I`I11,L[ anrl safvty posts at- the working a
face: will prcwunt 1111`l11}` roof-falll accirlcntxs ,_,. . .-..- 211
. 6. .~\ lI1&‘{lN\l1`I11g stick slmtilrl l><— nsorl su that- ltimlicrs
can always hc cnt, tn thc ])1‘t1[)t*]` lwngtli ,, ,,,,,,,- 28
7. A saw rathvr than an axv s1n>n1¤11¤- nsorl for trinnning
t'iinl><·rs_ ,, ,,, __l__ , ,,, _. _ ,, _ _ ,, ,,,, 29 I
S. Minors shonl0f0r<— th<—_v ar<~ avtnally
n0t·(‘1`S and cap pi<·<·0s slimilrl lm sturvrl in rnnin
n<—<·ks or crossciits, 01* Other plavvs whvru tht*_x‘ will -
not t)l>Nl1'11t'l (‘l<‘£l1'1l1l('(‘ along rnarls..,, , . H  . 34
10. llvavy cross bars shnnlrl ho liftwl and siippniitorl hy
a lII11l>(‘1‘j2`I(}I{, , ,, ,, ,   , ,,,, {11 n
11. \\'h<-n saft-ty posts arv l`l‘Il1(l\'<‘(l tn porinit 111t1\'t‘l11(‘l1l`» 3
uf lI1(*111Illl11§L]1111(‘lllI1(‘2l('1`()S$ tlw fa<·<*. thvy shnnlrl I
lw r<·pla<·<~Ullt>111,\\`I1It‘l1ISll1!‘lt‘1`I11IIlI1I(1I`ll1(*l11I1lI1I§(‘
systvni, slnnulrl lm l<<·pt in p<~rf<·<·t t·<>n