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18 TiiE Health Bulletin PRACTICAL METHODS FOR REMOVING IMPURITIES FROM PRIVATE WATER SUPPLIES Hardness.—For drinking purposes hardness should not be a matter of particular concern. But for economic reasons the removal of hardness has a certain amount of importance. When soap is used in hard water it forms a curd until enough is used to overcome the hardness. In water that is even moderately hard at least one pound of soap to every 7 5 gallons of water is wasted in this way. A certain portion of ordinary hardness may be removed by boiling for fifteen to twenty minutes. The portion which is not thrown out in this way may be removed advantageously by use of washing soda or lye in connection with the boiling. The substances causing hardness separate out and rise in the form of a white scum, which may be removed and thrown away. Tastes, odors, coloring matters.— Cistern water is commonly subject to one or more of these objectionable .O • Fig. 12. Cistern filter. The body of the filter is built of brick, laid in mortar composed of Portland cement mixed with an equal volume of clean sharp sand, and it is divided into two chambers by means of a partition slab (a) of concrete or flagstone. The bottom of the chamber, A, is provided with a low place or pocket (df in which sediment may gather, and from which it may be removed by the garden pump or other convenient means. The chamber, B, is fitted with a perforated bottom (b), on which is placed a course of gravel, and then clean sand, nearly up to the level of the discharge pipe (f). It is topped with gravel. The rain water enters the chamber, A, through the pipes (c), and deposits any solids that may accompany it in the pocket, as shown at (d). It then flows upwards through the sand in the chamber B. which clarifies it. The chamber. A, is also provided with an overflow pipe (e), so that if the filter becomes choked with dirt the water will not acquire sufficient head to force the dirt through the filter; it also acts as an overflow for the cistern into which (f) delivers.
Object Description
Rating | |
Fixed Title * | NCHH-04: The Health Bulletin [1914-1973] |
Document Title | The Health Bulletin [1914-1973] |
Subject Topical | Public health -- North Carolina -- Periodicals. |
Subject Topical Other | Public Health -- North Carolina -- Periodicals. |
Contributor | North Carolina. State Board of Health. |
Publisher | Raleigh, North Carolina State Board of Health. |
Repository | University of North Carolina at Chapel Hill. Health Sciences Library. |
Host | University of North Carolina at Chapel Hill |
Date | 1920 |
Identifier | NCHH-04-035 |
Form General | Periodicals |
Language | English |
Rights | This item is part of the North Carolina History of Health Digital Collection. Some materials in the Collection are protected by U.S. copyright law. This item is presented by the Health Sciences Library of the University of North Carolina at Chapel Hill for research and educational purposes. It may not be republished or distributed without permission of the Health Sciences Library. |
Digital Collection | North Carolina History of Health Digital Collection |
Sponsor | The North Carolina History of Health Digital Collection is an open access publishing initiative of the Health Sciences Library of the University of North Carolina at Chapel Hill. Financial support for the initiative was provided in part by a multi-year NC ECHO (Exploring Cultural Heritage Online) digitization grant, awarded by the State Library of North Carolina, and funded through the Library Services and Technology Act (LSTA). |
Volume Number | 35 |
Health Discipline | Public Health |
Digital Format | JPEG 2000 |
Print / Download PDF Version | http://archives.hsl.unc.edu/nchh/nchh-04/nchh-04-035.pdf |
Document Sort | all; group-b; nchh-04 |
Volume Link | http://dc.lib.unc.edu/cdm/search/collection/nchh/field/identi/searchterm/NCHH-04-035 |
Title Link | http://dc.lib.unc.edu/cdm/search/collection/nchh/field/documa/searchterm/NCHH-04 |
Catalog Record link | http://search.lib.unc.edu/search?R=UNCb1296443 |
Revision History | done |
Description
Fixed Title * | Page 18 (image) |
Document Title | The Health Bulletin [1914-1973] |
Subject Topical | Public health -- North Carolina -- Periodicals. |
Subject Topical Other | Public Health -- North Carolina -- Periodicals. |
Contributor | North Carolina. State Board of Health. |
Publisher | Raleigh, North Carolina State Board of Health. |
Repository | University of North Carolina at Chapel Hill. Health Sciences Library. |
Host | University of North Carolina at Chapel Hill |
Date | 1920 |
Identifier | NCHH-04-035-0196 |
Form General | Periodicals |
Page Type | all; all images; diagram; report/review |
Language | English |
Rights | This item is part of the North Carolina History of Health Digital Collection. Some materials in the Collection are protected by U.S. copyright law. This item is presented by the Health Sciences Library of the University of North Carolina at Chapel Hill for research and educational purposes. It may not be republished or distributed without permission of the Health Sciences Library. |
Filename | healthbulletinse35nort_0196.jp2 |
Digital Collection | North Carolina History of Health Digital Collection |
Sponsor | The North Carolina History of Health Digital Collection is an open access publishing initiative of the Health Sciences Library of the University of North Carolina at Chapel Hill. Financial support for the initiative was provided in part by a multi-year NC ECHO (Exploring Cultural Heritage Online) digitization grant, awarded by the State Library of North Carolina, and funded through the Library Services and Technology Act (LSTA). |
Volume Number | 35 |
Issue Number | 8 |
Page Number | 18 |
Health Discipline | Public Health |
Full Text | 18 TiiE Health Bulletin PRACTICAL METHODS FOR REMOVING IMPURITIES FROM PRIVATE WATER SUPPLIES Hardness.—For drinking purposes hardness should not be a matter of particular concern. But for economic reasons the removal of hardness has a certain amount of importance. When soap is used in hard water it forms a curd until enough is used to overcome the hardness. In water that is even moderately hard at least one pound of soap to every 7 5 gallons of water is wasted in this way. A certain portion of ordinary hardness may be removed by boiling for fifteen to twenty minutes. The portion which is not thrown out in this way may be removed advantageously by use of washing soda or lye in connection with the boiling. The substances causing hardness separate out and rise in the form of a white scum, which may be removed and thrown away. Tastes, odors, coloring matters.— Cistern water is commonly subject to one or more of these objectionable .O • Fig. 12. Cistern filter. The body of the filter is built of brick, laid in mortar composed of Portland cement mixed with an equal volume of clean sharp sand, and it is divided into two chambers by means of a partition slab (a) of concrete or flagstone. The bottom of the chamber, A, is provided with a low place or pocket (df in which sediment may gather, and from which it may be removed by the garden pump or other convenient means. The chamber, B, is fitted with a perforated bottom (b), on which is placed a course of gravel, and then clean sand, nearly up to the level of the discharge pipe (f). It is topped with gravel. The rain water enters the chamber, A, through the pipes (c), and deposits any solids that may accompany it in the pocket, as shown at (d). It then flows upwards through the sand in the chamber B. which clarifies it. The chamber. A, is also provided with an overflow pipe (e), so that if the filter becomes choked with dirt the water will not acquire sufficient head to force the dirt through the filter; it also acts as an overflow for the cistern into which (f) delivers. |
Digital Format | JPEG 2000 |
Print / Download PDF Version | http://archives.hsl.unc.edu/nchh/nchh-04/nchh-04-035.pdf |
Document Sort | all; group-b; nchh-04 |
Volume Link | http://dc.lib.unc.edu/cdm/search/collection/nchh/field/identi/searchterm/NCHH-04-035 |
Title Link | http://dc.lib.unc.edu/cdm/search/collection/nchh/field/documa/searchterm/NCHH-04 |
Catalog Record link | http://search.lib.unc.edu/search?R=UNCb1296443 |
Revision History | done |
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