THE CUBA R E V 1 T'. W 



.13 



Havana. There were 86 pupils at the 

 opening, and each one brings a small 

 sum of money from time to time, which 

 goes toward the support of the school. 

 Among other religious institutions on 

 the island is the Industrial School for 

 Negroes, which was started last year. 

 The bishop said the negro has been neg- 

 lected religiously, and that this new 

 school is the only one outside of the 

 public school to which the negro can 

 turn for education. Already there have 

 beeen fifty negroes confirmed, and the 

 work is meeting with great sucess. 

 It costs about $12,000 a year to carry 



on the work, and most of this is paid 

 by public subscription and by those in- 

 terested in the work. 



The new church in Guantanamo, says 

 the New York Churchman, is rapidly 

 approaching completion, and it will soon 

 be ready for occupation. It is the gift 

 of Mr. W. W. Frazer, of Philadelphia. 

 Another new church is In process of 

 erection at Ensenada de Mora, a sugar 

 estate east of Cienfuegos, on the south- 

 ern shore. It is being erected through 

 the generosity of Mr. Alfred Harrison, 

 of Philadelphia, and it will minister to 

 a population of more than 1,800 men. 



BRIDGE-BUILDING IN CUBA. 



Method and Cost. 



By Charles M. Kercher, Nucvitas, Cuba. 



The bridge Avas a 10-nieter or 32.81_ ft. 

 wooden highway truss bridge, something 

 on the style of a King truss. The abut- 

 ments are concrete and the bridge proper 

 is built entirely of the hardwoods abound" 

 ing plentifully in the district where it was 

 built. The woods used were: 



Acana ; weight 81 lbs. per cu. ft., modulus 

 of rupture 18,500 lbs., tensile strength 11,200 

 lbs. 



Jucaro prieto; weight 67.3 lbs. per cu. ft., 

 modulus of rupture 16,000 lbs., tensile 

 strength 11.200 lbs. 



Yaba roja; weight 75 lbs. per cu. ft., mod- 

 ulus of rupture 18,000 lbs., tensile strength 

 10,000 lbs. . 



The Yaba wood was used for flooring and 

 the Acana and Jucaro prieto were used in 

 the beams, stringers, etc. 



The concrete was a 1 — 3 — 5 mixture, 

 mixed by hand, and after being placed was 

 well spaded and tramped. The cement used 

 was Atlas Portland, which cost $4.50 per 

 bbl. at the work. The cost per cubic yard 

 of materials was as follows : 



1.13 bbl. of cement at $4.50 $5.08 



0.80 cu. yd. crushed rock at $2.85 per 



cu. yd 2.28 



0.48 cu. yd. river sand at 20 cts. per 



cu. yd 096 



Total $7,456 



The excavation for the abutments was 

 made in a good firm soil and was only of 

 a sufficient depth to secure good foothold 

 for the masonry. No solid rock could have 

 been found without excavating over ten 

 times the amount excavated. The excava- 

 tion consisted of 65 cu. yds. of common 

 excavation at $0,594 per cu. yd., a total of 

 $38.61. 



The cost of concrete, forms, etc., was as 

 follows : 



Total Cost per 



Cost. Cu. Yd. 



92 cu. yds. concrete $685.95 $7,456 



400 ft. B. M. lumber for 



forms at $18 per M. ft. 7.20 0.078 

 Labor on forms, 2 car- 

 penters, 2 days at $4. . . 8.00 0.087 

 ]\Iixing and placing 92 cu. 

 yds. concrete 94.76 1.03 



Total $795.91 $8,651 



The framing was carried on by a master 

 carpenter and two assistants under the con- 

 tinual supervision of the inspector. The 

 cost of timber, framing, etc., was as follows : 

 7,100 ft. B. M. hardwood timber at 



$50 $355.00 



Framing timbers (1 carpenter $2.50 



per day, 2 assts. $1.75 per day), 



8 days, $6 48.00 



1,000 lbs. plates, bolts, spikes, etc., 



at 16 cts. per lb 160.00 



Labor erecting, bolting, nailing, 5 



men 6 days at $1.50 45.00 



Painting 1,000 sq. meters, 2 coats 



red lead at 15 cts 150.00 



Total $758.00 



The painting was done by contract by a 

 firm that has a contract the year round to 

 paint all new structures. The summary of 

 costs is as follows : 



Excavation $38.61 



Concrete 795,91 



Bridge proper 614.00 



Superintendence 137.85 



Total cost $1,586.37 



This gives a cost per lineal meter of 

 bridge of $173.04 and a cost per lineal 

 foot of bri'dge of $52.76. — Engineering-Con- 

 tracting, Chicago. 



