Woollen clothing

And now for the vapour-bath. On a framework made up of three sticks, meeting at the top, they stretch pieces of woollen cloth, taking care to get the jams as perfect as they can, and inside this little tent, they place a dish with red-hot stones on it. They then take some hemp seed, enter the tent and throw the seed onto the hot stones. 

Specific grovify I 065-1 075. By friction on woollen cloth It becomes strongly negatively electric. 

Wet nitrocellulose can be pressed down manually in the kier by workers dressed in protective clothing, rubber shoes and woollen clothing for entering the boiler. In this way, as used in France, the loading density can be increased to 100 kg/m3. 

It should, however, be borne in mind that in some cases the ash does not depend on the nature of the dyeing to which the sample has been subjected thus, for example, the presence of chromium or iron is sometimes due to the use of shoddy in the manufacture of a woollen cloth, while the presence of tin in the ash of a silken fabric may be caused by the weighting. 

In another study, 0.25%- pynelhrins + 1. 0% PBO applied from domestic aerosol cans protected woollen cloth from attack by webbing clothes moths for up to 27 months and by carpet beetles for shorter periods when the treated articles were stored in the dark (Bry et vl., 1477). 

Flannelboard It is also some times referred to as flannel graph or felt board. It is made of wood, cardboard or strawboard covered with coloured flannel or woollen cloth. It is one of the latest devices effectively used for science teaching. Display materials like cut-outs, pictures, drawings and light objects backed with rough surfaces like sand paper strips, flannel strips etc. will stick to flannel-board temporarily. 

There is reason to believe, from evidence derived from the excavations at Pompeii, that the Romans milled woollen cloths by placing them in a bowl and stamping on them with their feet to give alternate con ression and relaxation. It is probable that an infusion of wood ashes was used to bring the pH out of the range of salt linkage formation. 

On a winter s day, when the ground is covered with snow, take four pieces of woollen cloth of the same size, and if possible thickness, but of different colours, viz. black, blue, brown and white, and lay them, at... 

Fulling Soap.— The soap used by cloth manufacturers for fulling or cleansing woollen cloth requires to be rather more alkaline than ordinary household soaps, but at the same time it must not contain such an excess of alkali as to affect injuriously the more delicate colours of the dyed wooL Some mamffactuxers employ a mixture of oleic acid... 

In the woollen, cloth, and silk textile industries, the use of soap for detergent and emulsifying purposes is necessary in several of the processes, and the following is a brief description of the kinds of soap successfully employed in the various stages. 

In some molecules, the dipole is permanent. Molecules with a permanent dipole are called polar molecules. A fine jet of polar molecules will be attracted towards an electrically charged plastic rod or comb. (The rod can be charged by rubbing it with a woollen cloth.) Figure 4.38 shows the result of this experiment. 

Water molecules have a dipole moment. If a plastic bail-point pen is rubbed vigorously with a woollen cloth, electrons are removed and the pen becomes positively charged. If the pen is then held next to a slow smooth stream of water from a tap, the water is deflected towards it. The negative ends of the water molecule dipoles become preferentially orientated towards, and attracted by, the positively charged pen, so the stream is deflected towards it. 

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