Lessons in Practical Hygiene for Use in Schools
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In our eReader you can find the full English version of the book. Read Lessons in Practical Hygiene for Use in Schools Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Lessons in Practical Hygiene for Use in Schools
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To quickly assess the difficulty of the text, read a short excerpt:
Besides rendering a house damp and cold, an absorbent building stone is more likely to decay prematurely.
The Board of Education Building Eegulations require stone walls to be 50 cms. (20 inches) thick, while solid brick walls need only have a depth of 33 cms. (13 inches), because, owing to the irregular shape of stones, a " bond " cannot be obtained in a thin wall.
(C) Slates.
Take the specimens provided and make observations on the points enumerated by the use of the following tests : (1) The... Surface.
Can this be scratched with the finger nail, does it feel smooth and greasy to the touch, are the edges friable or firm and even ? Are the grains of which it is composed compact and fine, do they run in the direction of its length, is the colour uniformly dark or light ?
(2) The Sound.
Strike the slates sharply with the knuckles. Is there a metallic ring or a dull thud ?
(3) The Odour.
Breathe upon the slates and then smell them. Is there an earthy or clayey smell emitted or are they inodorous ?
What to read after Lessons in Practical Hygiene for Use in Schools?
You can find similar books in the "Read Also" column, or choose other free books by Alice Ravenhill to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Besides rendering a house damp and cold, an absorbent building stone is more likely to decay prematurely.
The Board of Education Building Eegulations require stone walls to be 50 cms. (20 inches) thick, while solid brick walls need only have a depth of 33 cms. (13 inches), because, owing to the irregular shape of stones, a " bond " cannot be obtained in a thin wall.
(C) Slates.
Take the specimens provided and make observations on the points enumerated by the use of the following tests : (1) The... Surface.
Can this be scratched with the finger nail, does it feel smooth and greasy to the touch, are the edges friable or firm and even ? Are the grains of which it is composed compact and fine, do they run in the direction of its length, is the colour uniformly dark or light ?
(2) The Sound.
Strike the slates sharply with the knuckles. Is there a metallic ring or a dull thud ?
(3) The Odour.
Breathe upon the slates and then smell them. Is there an earthy or clayey smell emitted or are they inodorous ?
What to read after Lessons in Practical Hygiene for Use in Schools?
You can find similar books in the "Read Also" column, or choose other free books by Alice Ravenhill to read onlineMoreLess
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