Certainly as it develops it may well have a potential for marginal drought-proofing at Washington, an emergency source to be drawn upon if needed.
At most of these sections a brick arch and water-proofing were used, on account of the presence of water.
Water-proofing Company's compound--have been made with apparent success up to the present time, and the results after the lapse of a considerable period are awaited with interest.
The water-proofing referred to above was in all cases felt and pitch laid with six thicknesses of felt and seven of pitch.
The water-proofing was then patched and the concrete replaced.
The water-proofing of the sub-track conduits was troublesome, as the numerous layers and the necessity for preserving the proper laps in both directions between adjacent layers made the whole thing a kind of Chinese puzzle.
The usual force in water-proofing consisted of a foreman, at $3.
Rough forms were used, as the interior surfaces of the passages were to be rendered with a water-proofing cement.
The work was carried out as specified; the sand-walls were not rendered, but were built smooth enough to apply the water-proofing directly to them.
The cost of the water-proofing operation was about as shown in Table 14.
The laying of ducts below subgrade was not complicated by the presence of bonds, the water-proofing caused the trouble here, as before described.
By the time the work was in hand, some distrust had arisen as to the efficiency of this mastic coating, and a great deal of study was devoted to the problem of how to apply a felt and pitch water-proofing to the arches.
It is then water-proofed with vulcanite water-proofing and gravel.
Memoranda giving details of rat catching and rat-proofing are also presented and notes showing the location of dead rats found in relation to dead human bodies of plague victims.
In the suppression of the San Francisco epidemic in 1907 rat-proofing was also extensively resorted to.
Rat-proofing of dwelling houses is less expensive than perpetual wholesale rat destruction and is a perfectly effective measure against human plague.
In one building alone more than 150 rat cadavers were found during our cleaning and rat-proofing operations.
As a matter of fact, hundreds of dead rats, almost certainly plague rats, were found in the course of rat-proofing operations.
The apparent impracticability of actually rat-proofing Manila at the present time and our inability to starve the animals out, justify the other and less permanent measure, viz.
Rat-proofing is highly desirable, permanent in its results, and in every respect the "method of election.
Municipal authorities should take up the matter of rat-proof construction for new buildings and the rat-proofing of old ones by approved alterations.
Others illustrate methods of rat-proofing bamboo timbers in houses of light material.
In all these cases, the gutta-percha gum acts not only as a cement but also a water-proofing to the hat.
For this reason it is advisable that all parchments and papers be kept in a drawer or cupboard of a safe, as the second enclosure (though with no more fire-proofing round it) gives a slight extra security.
Of course the actual amount of resistance to fire depends largely on the capacity of the proofing chambers.
A tolerably correct guide in the purchase of a safe is its weight, wherein the light plate and thin proofing cases are sure to betray themselves.
A new method of rust proofing which is free from these disadvantages is the phosphate process invented by Thomas Watts Coslett, an English chemist, in 1907, and developed in America by the Parker Company of Detroit.
The algin extracted from the Pacific kelp can be used as a rubber surrogate for water-proofing cloth.
The concerns most frequently used by the men in their transactions, the police say, were known as National Fire Proofing Company of New York and the Federal Trust Company of South Dakota.
The following is a list of the concerns, the names of which have been learned by the police: National Fire Proofing Company, New York and Chicago.
Of late soluble glass has been used with good effect as a preservative coating for stones, a fire-proofing solution for wood and textile fabrics.
As a fire-proofing material it would be excellent were it not that the alkaline reaction of this glass very often changes the coloring matters of paintings and textile fabrics.
In order to prevent the water-proofing from being torn at the joint between sections when they contract from changes in temperature, a vertical strip of felt, 6 in.
The brick wall was then water-proofed on the side toward the concrete, and loose laps of the water-proofing were allowed to hang over the brickwork and at least 8 in.
The water-proofing consisted of three layers of Hydrex felt, of a brand known as Pennsylvania Special, and four layers of coal-tar pitch.
The back of this strip was not pitched, but was covered with pulverized soapstone, so that the water-proofing sheet was free from the wall for a distance of 3 in.
The wall was designed with a stepped back, primarily to allow the water-proofing and brick protection to be held in position more readily.
It is, therefore, the part of wisdom to place reliance on draining the water away from the house rather than on water-proofing the cellar wall.
By water-proofing the main wall and then backfilling against the wall with coarse gravel or broken stone, the same results as with open areaways are obtained and at a much smaller cost.
What was needed was a process which would allow of a through-and-through proofing and stiffening, and also of satisfactory dyeing of the stiffened and proofed felt.
In fact, were it not for this "proofing process" (see Lecture VII.
A solution of shellac in wood spirit is indeed used for the spirit-proofing of silk hats, and to some extent of felt hats, and on the whole the best work, I believe, is done with it.
They attained their object by rubbing the proofing varnish on the inside of the hat bodies, in some cases first protecting the outside with a gum-varnish soluble in water but resisting the lac-varnish rubbed inside.
The best solvent for shellac, however, in the preparation of the stiffening and proofing mixture for hats, is probably wood spirit or methylated spirit.
There are, or ought to be, three aims in the process of proofing and stiffening, all the three being of equal importance.
In proofing the felt, the fibres become varnished over with a kind of glaze which is insoluble in water, and this varnish or proof is but imperfectly removed from the ends of the fibres on the upper surface of the felt.
Whichcord's plan of fire-proofing encases metal girders in blocks of fire-clay; other systems make great use of concrete.
Various methods have been adopted for fire-proofing wood, the strong solution of silicate of soda being one of the best.
In 1823 a Scotchman, Mackintosh, applied the discovery, that rubber gum was soluble in benzine, to the water-proofing of the cloth that bears his name.
The following are the methods recommended by the New York City Tenement House Department for the water-proofing and damp-proofing of foundation walls and cellars: Water-proofing and Damp-proofing of Foundation Walls.
There shall be constructed on the outside surface of the walls a water-proofing lapping on to the damp-proof course in the foundation walls and extending up to the soil level.
Other methods of damp-proofing foundations and cellars consist in the use of slate or sheet lead instead of tar and tarred paper.
Water-proofing and Damp-proofing of Cellar Floors.
This water-proofing to be well stuck to the damp course in the foundation walls.
The water-proofing course must be properly lapped on and secured to the damp course in the foundation walls.
The silk covering of the wings had been coated with a special fire-proofing preparation, but the intensely hot flame, of course, charred all the silk that it came in contact with.
While the water-proofing and concreting were being done, the air pressure was kept at from 30 to 33 lb.
Forms were erected on the neat line, and the space to the rock was filled with concrete making a so-called sand-wall similar to that commonly used for water-proofing with felt and pitch.
The water-proofing was done by the Union Construction and Waterproofing Company.
As much pitch as possible was then slushed between the brick and the sand-wall, after which the concrete in the main wall was filled up to the top of the water-proofing course.
At the start an attempt was made to stick the water-proofing to the sand-wall, but this could not be done on account of its dampness and the overhang at the top.
The bench-wall was built with a back form on the neat line, the water-proofing was placed as shown, protected by an armor course of brick, and then continued over the arch when this latter was built.
The back lagging was used over the arch, both where the sand-wall was built and where it was omitted, as well as being placed over the water-proofing of the arch as an armor course where water-proofing was required.
Where the water-proofing was placed against the sand-wall, the method of securing the sheets at the top is shown in the small sketch on Fig.
The sand-wall water-proofing was kept about 35 ft.
When the sand-walls and water-proofing were not built, however, the concrete of the foundations was sloped from the neat line back to the rock, as shown by Fig.
A and B, along the foot of the water-proofing and connected at intervals with the drains by 4-in.
The completion of the bench-wall left the upper part of this water-proofing stretched taut across the curved top of the sand-wall, forming a chord of the arc.
The water-proofing of these sections was left until just before the arch was to be built, and after being placed it was protected by a single row of brick laid on edge before the rock packing was filled in.
The method of water-proofing that part of the timbered section which was very wet, is shown at F, Fig.
Tests of the fire-proofing and fire-resistive properties of various structural materials are carried on in the laboratories in Building No.
The fire-proofing companies which employed men of the same union took the same action.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "proofing" in a variety of sentences. We hope that you will now be able to make sentences using this word.
