NOTES AND COMMENTS.

New Zealand Herald, Volume LXVII, Issue 20482, 6 February 1930, Page 5

NOTES AND COMMENTS.

Descriptions of the cricket match between England and Auckland will bo given from 11"A next Saturday, Monday und Tuesday.

Tlio relay of a concert organised by the, Hamilton Orchestral Society from a steamer moored in tho Waikato River, which was to have been carried out by IYA next Wednesday evening, has been cancelled, and an attractive studio programme has been substituted.

A series of six weekly lectures on zoology will be given shortly from IYA. The first address will be given by the president of the Auckland Zoological Society, Mr. George Baildon, on February 25. Tho speaker for tlio following week will bo Professor J. Sperrin-John-son.

Tho public meeting convened by the Auckland branch of tho British Empire Cancer Campaign Society at the Town Hall this evening will, in all probability, bo 'relayed by IYA. The speakers will bo the Minister of Health, the Hon. A. <T. Stalhvorthv, Dr. ,T. S. Elliott and Mr. J. W. Shaw.

New artists who will be appearing at IYA studio next week include Miss Alice Bennetto and Mr. Elton Black, both of whom have appeared in New Zealand in 'revue and musical comedy productions, Miss Matty Youngson, soprano, Miss Marian Irving, elocutionist, Mr. J. Finlavson, humorist, and Mr. Eric Wise, saxophonist.

Music lovers are being well catered for by IYA. On February 21 a lecture-re-cital will be given on the works of Schubert. A special night will be devoted to'the compositions of Verdi on March 11. while on March 28 there will be a special Haydn evening. March 31 will ho tho anniversary of Haydn's birth. It is tho aim of IYA to colebrale the birthdays of famous composers and authors whenever possible.

The clear-cut resonance characteristic 'of a crystal is now being utilised to ensure selective reception, particularly in resistanco-coupled circuits where the tuning is normally broad. In multi-stage valves the ordinary compact coupling resistance is combined,'inside the glass bulb, with a quartz crystal calibrated to pass only waves of a given frequency. This particular arrangement is designed for use on a superhet set, between the first detector and the grid'of the intermediate-frequency amplifier. The same seloctivo action can, however, be applied to an ordinary inter-valve coupling, though this necessitates the use of a set of interchangeable crystal units, I graded according to tho particular station ' to bo received.