Washington Gas Light Co. reported a loss of $1.47 million (34 cents a share) for the three months ended June 30, up sharply from its $853,000 (20 cents) deficit a year earlier.Revenues increased from $55.5 million to $60.3 million.

For the latest 12 months, Washington Gas reported operating earnings of $16.13 million ($3.02) off slightly from the $16.1 million ($3.03) earned during the same period a year earlier.

Macke Co. reported earnings from continuing operations increased to $1.3 million (42 cents a share) from $930,000 (31 cents) for third quarter ended June 30. Revenues increased to $59.2 million from $49.8 million for the Washington food and vending services company.

For the nine months, Macke earned $3.5 million ($1.6) on continuing operations, up from $2.8 million (94 cents) the prior year.

A $50,000 gain from discountinued operations this year increased the final nine-month met to $3.6 million ($1.18). A year ago, a similar gain of $90,000 produced a final net of $2.9 million (97 cents). Sales for the period were $169.9 million, up from $146.8 million.

Dynalectron Corp. of McLean reported a loss of $572,000 for the second quarter ended June 29 compared with a $66,000 profit last year. Revenues increased to $73.6 million from $69.5 million.

For the first half Dynalectron reported a loss of $993,000 against last year's $136,000 loss.Revenues increased to $140.5 million from $124.6 million.

Dynalectron said the losses were due primarily to "large unanticipated loss in its waste water treatment plant construction activities." Small losses were incurred from industrial insulation operations due to strikes and lower-than-normal work loads.

Avemco Corp. reported earnings of $619,000 (25 cents a share) for the three months ended June 30 up from $481,000 (17 cents) a year earlier.

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The Bethesda aviation insurance and financing company said revenues for the quarter increased to $3.9 million from $3.45 million.

Six-month earnings were $1,011,000, up $1,000 from the prior year. On a per-share basis, profits grew from 35 cents to 41 cents, however, because of a decrease in the number of shares outstanding.