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We present the wavelength calibration of the Hamilton echelle spectrograph(the Lick observatory). The main problem of the calibration arises from thefact that thorium lines are absent in the spectrum of "ThAr" hollow-cathodelamp now under the operation. On the other hand, numerous unknown strong linesare present in the spectrum. These lines was identified with titanium. Weestimate the temperature of the lamp gas which permits us to calculate theintensities of the lines, and to select a large number of relevant Ti I and TiII lines. The titanium line list for the Lick hallow-cathode lamp is presented.The wavelength calibration using this line list was made with accuracy about0.006A.

Wavelength calibration of the Hamilton echelle spectrograph