THE MINERAL INDUSTRY OF MASSACHUSETTS 
 
 
Table 3.—Indicators of Massachusetts business activity 
401 
 
1966 
1967 
Change 
 
 
(percent) 
Personal income: 
 
 
 
   Total millions_   Per capita                                      Construction
activity: 
Cement shipments to and within Mass. 
 thousand 376-pound barrels -   Construction contracts 1 thousands~     
Nonresidential bldgs do.~      Residential bldgs do..      Nonbuilding construction
doMineral production do. 
Annual average labor force and employmejit: 
   Civilian workforce thousands   Total employment    do   Unemployment 
percentManufactuiing employment: thousands. 
 Durablegoodsemployment do. 
 Primary metals do~ Fabricated metal products do - - - Machinery do..~. Electrical
equipment and supplies do.. Transportation equipment do.. 
Instruments, optical goods, watches, clocks - - thousands - 
 Miscellaneous do. 
$17,675 
$3,271 
 
 
5,986 
$1,221,628 
$558,487 
$435,804 
$227,337 
$38,473 
 
2,407.9 
2,302.8 
4.2 
694.3 
344.2 
22.9 
43.6 
79.8 
97.6 
26.6 
29.1 
44.6 
p $18,909 
P $3,488 
 
 
P 6,105 
$1,412,303 
$666,561 
$479,387 
$266,355 
$40,612 
 
2,430.1 
2,327.3 
4.2 
696.7 
353.9 
22.9 
44.4 
78.0 
101.8 
28.3 
31.1 
47.4 
+7.0 
+6.6 
 
 
+2.0 
+15.6 
+19.4 
+10.0 
±17.2 
+5.6 
 
+.9 
±L1 
.0 
+.3 
+2.8 
.0 
+1.8 
—2.3 
+4.3 
+6.4 
+6.9 
+6.3 
   Nondurablegoodsemployment doContract construction employment do.Service,
mining and miscellaneous do~. 
350.1 
88.1 
383.3 
342.8 
87.4 
398.6 
—2.1 
— .8 +4.0 
'  Preliminary. 
1 F. W. Dodge Division, McGraw-Hill Information Systems Company. 
 
 Sources: U.S. Bureau of Mines; U.S. Department of Labor; Commonwealth of
Massachusetts, Division of Employment Security; U.S. Department of Commerce.

 
 
Table 4.—Employment and injury experience in the mineral industries

 Average  menYear and industry working  daily 
Days 
Active 
Man- 
days 
worked 
(thou- 
sands) 
Man- 
hours 
worked 
(thou- 
sands) 
Number of 
injuries 
Injury rates per 
million man-hours 
 
 
 
 
Fatal Nonfatal 
Fre- Severity quency 
1966: 
 Nonmetal and peat 77 Sand and gravel 991 Stone 1,080 
 Total 1 2,148 
 
1967: P 
 Nonmetal and peat 65 Sand and gravel 1,005 Stone 955 
 Total' 2,030 
293 
219 
241 
23 
217 
260 
181 
1,821 
2,103 
 31 39 44 
16.57 97821.97 3,85420.92 714 
 
233 
500 
4,104 
1 86 
21.20 2,118 
 
286 
229 
267 
18 
230 
255 
147 
1,882 
2,059 
  10 - - - - 38 1 51 
68.26 1,40620.19 58725.26 3,625 
 
248 
504 
4,087 
1 99 
24.47 2,146 
'  Preliminary. 
lData may not add to totals shown because of independent rounding. 
 
REVIEW BY MINERAL COMMODITIES 
NONMETALS 
 
 Clays.—Production and value of clay increased over the 1966 figures.
Norfolk County was the leading producer with one company that mined shale
for use in manufacturing lightweight aggregate. Miscellaneous clay was mined
by one company in Hampden County and one 
 
company in Plymouth County for use in building brick; another company in
Hampden County permanently closed November 1966. 
 
 Gypsum.—A plant in Suffolk County manufactured calcined gypsum products
from crude gypsum imported from Nova Scotia, Canada.