Oil collected during -

Specific gravity at 15° C.

Rotation aD.

Refractive index at

20°C.

Flotation efficiency.

First hour...

0.8835

. 657°

1.4791

98.1

Second hour

0.8913

- 64.2°

1.4801

99.8

Third hour... ......

0.8932

. 63.0°

1.4799

102.2

Fourth hour ......

0.8981

. 64.5°

1.4810

I02.I

Fifth hour... ......

0.9040

- 6o'.o°

1.4821

100.3

Sixth hour...

0.9116

. 56.2°

1.4828

104.2

Seventh hour

0.9113

. 55.3°

1.4831

99.4

Eighth hour

0.9130

. 53.6°

1.4832

102.2

Front this table the high flotation efficiency of the oil of this species is evident, and is superior to that of other Eucalyptus oils, although the product of E. phellandra is but little inferior for the purpose.

The following tabulated results are from the oil of E. phellandra, the "Narrow leaf Peppermint," distilled at Mongarlowe, New South Wales, by Mr. F. Webb. Ordinary material was used, and the distillation carried out by the usual square tank with direct firing. The flotation efficiency results were determined by Mr. H. Lavers, the standard being that of E. dives taken as 100.