General.

In conclusion, I shall briefly recapitulate the leading points of my subject, and consider its practical bearing.

Leaving out the materials in Tables II. and IV., which are comparatively valueless, the following will show the various purposes for which the Otago limes are suited, each class being capable of performing the functions of those under it as well as its own:—

The rich limes are well dispersed throughout the province, but the hydraulic ones are confined to the vicinity of Dunedin, except we include the Lake Wakatipu deposits, the hydraulicity of which has not been proved. Although lime has been burnt on the Peninsula for many years, none of the good scams have been utilised. The proprietors inform me that there is no market for this quality. Builders will not use it in preference to the rich lime, as the latter carries more sand, and in the absence of any information on the subject, professional men and the public generally have no choice. In order to institute a comparison between the various articles under discussion, I have prepared the following statement, showing the strength and cost of mortars now used in Dunedin, together with an estimate of other kinds prepared from the hydraulic limestones.