XX 



AMERICAN HOMES AND GARDENS 



May, 1907 



HOW ARE THE BEAMS 



HELD 



WHERE THEY ABUT 

 THEIR SUPPORTS? 



Are they" Cut Awajr hy^ 



Framing ? 



Do You Depend Merely" 

 on Spiking? 



The Best Way is to Use 

 Our Joist Hangers. 



LANE BROS. CO. ( 



The Door Hanger 

 cTWanufacturers 



) 



434-466 PROSPECT ST. 

 POUGHKEEPSIE, N. Y. 



Cement Concrete 



Remforceci Concrete 

 Concrete Building BIocks 



SCIENTIFIC AMERICAN SUPPLEMENT 

 ■543 contains an article on Concrete, by 

 Brysson Cunningham. The article clearly 

 describes the proper composition and mixture 

 of concrete and gives the results of elaborate 

 tests. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1538 gives the proportion of gravel and sand 

 to be used in concrete. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 '567. 1568, 1569, 1570, and 1571 contain an 

 elaborate discussion by Lieut. Henry J. Jones 

 of the various systems of reinforcing con- 

 crete, concrete construction, and their appli- 

 cations. These articles constitute a splendid 

 text book on the subject of reinforced con- 

 crete. Nothing better has been published. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 997 contains an article by Spencer Newberry 

 in which practical notes on the proper prepa- 

 ration of concrete are given. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 1568 and 1569 present a helpful account of 

 the making of concrete blocks by Spencer 

 Newberry. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1534 gives a critical review of the engineer- 

 ing value of reinfo'rced concrete. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 1547 and 1548 give a resume in which the 

 various systems of reinforced concrete con- 

 struction are discussed and illustrated. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 1564 and 1565 contain an article by Lewis 

 A, Hicks, in which the merits and defects 

 of reinforced concrete arc analyzed. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1 55 1 contains the principles of reinforced 

 concrete with some practical illustrations by 

 Walter Loring Webb. 



SCIENTIFIC AMERICAN SUPPLEMENT 



1573 contains an article by Louis H. Gibson 

 on the principles of success in concrete block 

 manufacture, illustrated. 



SCIENTIFIC AMERICAN SUPPLEMENT 



1574 discusses steel for reinforced concrete. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 '575.1 1576, and 1577 contain a paper by 

 Philip L. Wormley, Jr., on cement mortar 

 and concrete, their preparation and use for 

 farm purposes. The paper exhaustively dis- 

 cusses the making of mortar and concrete, 

 depositing of concrete, facing concrete, wood 

 forms, concrete sidewalks, details of con- 

 struction of reinforced concrete posts, etc. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1372 contains an article by A. D. Fibers on 

 tests and constitution of Portland cement. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1396 discusses the testing of cement. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1325 contains an article by Professor Will- 

 iam K. Hatt giving an historical sketch of 

 slag cement. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 955 and 1042 give good accounts of cement 

 testing and composition, by the well-known 

 authority, Spencer B. Newberry. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 1510 and 1511 present a discussion by 

 Clifford Richardson on the constitution of 

 Portland cement from a physico-chemical 

 standpoint. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1 519 contains an essay by R. C. Carpenter 

 on experiments with materials which retard 

 the activity of Portland cement. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 1465 and 1466 publishes an exhaustive illus- 

 trated account of the Edison Portland ce- 

 ment works, describing the machinery used. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 149 1 gives some fallacies of tests ordinarily 

 applied to Portland cement. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1 56 1 presents an excellent review by Brysson 

 Cunningham of mortars and cements. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1533 contains a resume of the cement in- 

 dustrv and gives some valuable formulae. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1575 discusses the manufacture of hydraulic 

 cement. L. L. Stone is the author. 



SCIENTIFIC AMERICAN SUPPLEMENTS 

 1587 and 1588 contain an able paper by 

 Edwin C. Eckel on cement material and 

 industrv of the United States. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1586 contains a review of concrete mixing 

 machinery by William L. Larkin. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1583 gives valuable suggestions on the selec- 

 tion of Portland cement for concrete blocks. 



SCIENTIFIC AMERICAN SUPPLEMENT 

 1 58 1 splendidly discusses concrete aggre- 

 gates. A helpful paper. 



SCIENTIFIC AMERICAN _ SUPPLEMENT 

 1595 presents a thorough discussion of sand 

 for mortar and concrete, by Sanford E. 

 Thomson. 



Each numter of tke Supplement costs 10 cents. A set of papers 

 containing all tlie articles atove mentioned will be mailed for $3.50 



Order from your Newsdealer or from 



MUNN ^ COMPANY, 361 BROADWAY, NEW YORK CITY 



process with pollen was carried out, and truly 

 marvelous results followed. One of the 

 new seedlings had a dazzling brilliant color 

 and was hardy enough to survive winter ex- 

 posure. This plant formed the basis of fur- 

 ther experiments, and is the original still in 

 the Philadelphia nursery. 



With such a strenuous offspring, it was 

 now possible to set to work in earnest to 

 improve the swamp mallow. The flowers of 

 the new hybrid were pollenized with another 

 type. The seedlings from this fertilization, 

 it was noticed, were vastly different in form 

 and foliage, showing great promise of a suc- 

 cessful cross. The first flower to bloom was 

 a glorious pink, a shade never before seen in 

 a swamp mallow. This was followed in rapid 

 profusion by flowers of every shade of pink, 

 white, red and scarlet. A new race had truly 

 been created. A new page to horticultural 

 research was added. 



Thirty years ago, Mr. Thomas Meehan, 

 of Philadelphia, predicted that such a mat- 

 ing would reproduce an attractive offspring, 

 but not until 1903 was the work undertaken. 

 To-day thousands of roots of these bewitch- 

 ing mallows are being disseminated from the 

 Meehan nurseries in Germantown, Philadel- 

 phia. 



TARVIA, THE DUST LAYER 



ANOTHER automobile season, and many 

 , people, especially those who live on 

 thoroughfares frequented by automo- 

 biles, as well as the automobilists themselves, 

 will look with renewed dread to the summer 

 dust nuisance. 



^lany modern automobiles are so designed 

 that the occupants are not disturbed by the dust 

 of their own machines, but they can not escape 

 that raised by other vehicles on the road. As 

 for the householders, they suffer constantly, 

 and the coming of the automobile has in many 

 cases depreciated instead of increased the value 

 of property. 



Everybody has seen roads where clouds of 

 dust hang for many minutes in the air after 

 the passage of a single automobile. Sprinkling 

 is expensive, and instead of decreasing the 

 nuisance actually increases it. The constant 

 use of water on the road breaks up the natural 

 bond of the top dressing so that mud is formed, 

 which soon becomes dust again in the hot sun. 

 Roads which are regularly sprinkled require 

 re-surfacing much oftener than roads which 

 can be left to themselves. 



Oil has been used in many localities for the 

 purpose of suppression of dust, especially in 

 California, where it is exceedingly cheap. It 

 is only partially effective, and develops another 

 nuisance on account of the damage it does to 

 vehicles and to garments. 



The best of the propositions for the sup- 

 pression of dust, and the one which is recom- 

 mended by the United States Department of 

 Agriculture, is a tar preparation of the right 

 grade and character. This is sold by the lead- 

 ing manufacturers of coal tar products under 

 the name of Tarvia, the makers having made 

 prolonged experiments to determine which of 

 the various tar compounds is best adapted to 

 the purpose. 



In France this material has been used since 

 1900, when the League for the Supression of 

 Dust first reported successful experiments with 

 it. This League was formed to abate a dust 

 nuisance which was rapidly making the Riviera 

 positively unpleasant in many sections and 

 seriously damaging property values at the great 

 resorts of that district. The use of Tarvia was 

 so successful that it was adopted with modifica- 

 tions in all the departments of France, and 

 it is now the standard method of preserving 

 macadam roads throughout the French Re- 

 public. 



