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June 17th. 1879

Phalaris with caustic on tips of Cotyledons before SW window in Black Box — Day moderately bright— Observed at 4° 40' Pm

A length of about 2 mm of tips was moistened & rubbed with Caustic

This represents 2 black dots to show in evening whether any growth

(1) 8° 12 am ⨀ ⨀— Black tip 2. mm— not grown — slightly heliotropic

(2) 8° 12 ⨀ ⨀ Black tip 3 mm— hardly grown— almost quite straight

(3) 8° 12 ⨀ ⨀ Black tip 4 mm— not grown— almost quite straight

(4) 8° 12 ⨀ ⨀ Black tip very small — not grown.— very slightly Heliotropic

(5) 8° 12' ⨀ ⨀ not grown Black tip 2 1/2 mm slightly Heliotropic.

(6) 8° 24' ⨀ ⨀ not grown — almost straight —Black tip 3 mm

(7) 8° 24' ⨀ ⨀ slightly Heliotropic

(8) 8° 24' ⨀ ⨀ Slightly Heliotropic

These experimentsa complete failure, for no growth cd be proved to have occurred in the 8 hrs in the lower portions of Cots— Moreover most of them were acted on by the light—

Say nothing about caustic on tips