field, partial achromatism) over the usual types of quartz spectrographs for investigating the shorter waves. ## III. '4 Stigmatic Concazv Gvatirlg ,Ilozt&zg.-The Wadsworth mounting in which the slit is, in effect, placed at infinity with the aid of an auxiliary mirror, thus filling the concave g
Durability of cement drain tile and concrete in alkali soils
β Scribed by R.J. Wig; G.M. Williams; A.N. Finn; S.H. McCrory; E.C. Bebb; L.R. Ferguson
- Publisher
- Elsevier Science
- Year
- 1917
- Tongue
- English
- Weight
- 571 KB
- Volume
- 183
- Category
- Article
- ISSN
- 0016-0032
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
This paper gives detailed description of the calorimeter designed to determine the latent heat of vaporization of ammonia. This important refrigeration constant was determined through the temperature interval -42 Β° to +52 Β° C. At o Β° the latent heat is 3Ol.8 calories per gramme. The results of 34 se
Current concern with alkali silica reactions is due to rising alkali contents of cements, changed concrete technology, and necessity of employing marginal aggregates in many areas, as well as to new reports of field damage coming to light. A brief overall view of the physicochemical basis for alkal
This study was carried out in order to check the efficiency in water transport capacity in the trench backfill zone (IT) in 2-45-year-old tile drains, and the differences between IT and the zone midway between trenches (BT) in field-saturated steady-state infiltration rate (I fs ) and saturated hydr