VIII. STANDARD SAMPLES ISSUED OR IN PREPARATION

A separate leaflet, entitled "Supplement to Bureau of Standards Circular 25," contains a complete list of samples available at the given date, together with analyses, physical constants, weights, and fees. This circular will be sent upon request.

IX. ORDERING AND SHIPPING REGULATIONS

1. ORDERING

Orders should give both the number and name of the sample wanted. Example: No. 9c Steel, Bessemer, 0.2 C. The list of standard samples, their numbers, prices, and analyses are to be found in the "Supplement to Bureau of Standards Circular No. 25." No samples of smaller size than those listed are distributed.

2. TERMS AND SHIPPING

(a) Domestic.-Samples may be paid for in advance with order. If a remittance does not accompany the order, all samples will be sent under Government frank by parcel post C. O. D. in the United States and its possessions. It is therefore important that firms with branch laboratories send remittances with their orders if the laboratories can not receive C. O. D. packages. Both the central office and branch laboratory will be notified when shipment is made. No discounts are allowed on any orders.

(b) Foreign.-All foreign shipments require prepayment. With the exception of Mexico and Canada, 20 cents postage must be added for every 300 g of sample. Shipments intended for Mexico and Canada will be sent under Government frank, but not C. O. D. (c) Money orders, etc., should be payable to the Bureau of Standards.

3. BOTTLING

Iron, steel, and ore samples are sent in screw-capped glass bottles, and organic samples in glass-stoppered bottles under seal.

4. LITERATURE

Detailed certificates of analysis are sent under separate cover to the same destination as the samples. These certificates give the results obtained by all of the analysts for all of the constituents determined by them. Gummed labels, with the summary of analysis, are also furnished with most samples. Circulars containing information on certain samples may be obtained upon request. In the case of new or renewed samples provisional typewritten certificates are supplied until they can be replaced by the printed certificates and labels when ready.

3. SAMPLES OUT OF STOCK

The preparation of "renewal" samples is intended to be complete at the time each kind of sample becomes exhausted, but, owing to delays encountered in obtaining a proper grade of material and for other reasons, this is not always possible. If orders are received for samples that are out of stock, notice will be mailed to that effect. Notice will also be sent when the "renewal" is ready. The "renewal" of an analyzed sample will have a composition more or less different from that of its predecessor, but, as regards the characteristic constituent or constituents, will pattern after it closely.

6. NEW SAMPLES

When new samples are issued announcement will be made in scientific and trade journals.

7. MIXING

In order to overcome the effect of any segregation of granular samples in shipment the contents of each bottle (except the organic samples) should be thoroughly mixed before any is used for analysis. GEORGE K. BURGESS,

Approved:

HERBERT HOOVER,

Secretary of Commerce.

Director.

DEPARTMENT OF COMMERCE

BUREAU OF STANDARDS

George K. Burgess, Director

SUPPLEMENT TO CIRCULAR NO. 25

April 24, 1928

STANDARD SAMPLES ISSUED OR IN PREPARATION

The samples are listed by groups; the sample numbers represent the order of issuance of the first representative of each kind. Renewals of an analyzed sample are indicated by the original number, with an added letter to denote its intended relation. Thus, 10a is the first, 10b the second, and 10c the third renewal of No. 10 Bessemer 0.4 C steel. In this way a given number will always represent a material of fixed or approximately fixed composition. Numbers missing from the series in the following table represent samples of which the supply has become exhausted and which it is not the present intention to replace.

ORDERING. Orders should give both the number and name of the sample wanted. Example: No. 9c, steel, Bessemer, 0.2 C. The list of standard samples, their numbers, prices, and analyses are to be found in the succeeding pages. No samples of smaller size than those listed are distributed.

TERMS AND SHIPPING.-(a) Domestic.-Samples may be paid for in advance with order. If the remittance does not accompany the order, all samples will be sent under Government frank by parcel post C. O. D. in the United States and its possessions. It is therefore important that firms with branch laboratories send remittance with the order if the laboratories can not receive C. O. D. packages. Both the central office and branch laboratory will be notified when shipment is made. No discounts are allowed on any orders.

(b) Foreign. All foreign shipments require prepayment. With the exception of Mexico and Canada, 20 cents postage must be added for every 300 grams of sample or fraction thereof. Shipments intended for Mexico and Canada will be sent under Government frank, but not C. O. D.

(c) Money orders, etc., should be payable to the Bureau of Standards. Payment for foreign orders should be by an international money order or by a check payable through the New York Clearing House or a bank in the United States.

96901-28

1

100

3.00

100

3. OG

100

3.00