Monthly Archives: November 2009


Now I have an xray machine to play with at work, I can take photographs of the insides of things. I shall make full use of this. Here’s an old transistor to start with.

Xray image of an old  Mullard OC44 transistor

Image details : Mullard OC44 PNP Germanium transistor, glass envelope. 90kV polychromatic xrays, filtered with 1.5mm Al and 0.2 mm Cu. CsI scintillator, 6 sec exposure.

30ish feet below Holborn

Last night I spent forty-odd minutes thirty-ish feet below Holborn in the Kingsway Tram Tunnel, the reason was because I’d always wondered what was down there. The event that made it possible was Chord an installation art piece by Conrad Shawcross. The art is basically a large rope weaving machine, slowly weaving 300m of multicolored rope. I found the engineering more impressive than the art.

Photography of the piece was discouraged, and I’d forgotten my camera anyway, not that this has stopped photographs appearing on flickr.