当使用帕尔默-马龙尼（P-M）方法进行藻类计数是有利的时候，就会出现这种情况。这种方法在美国并不常用，可能是因为很难找到P-M室的商业来源。探讨了在现场建造塑料粉末冶金室的可能性。包括13个参考文献，图。

Occasions arise when it is advantageous to use the Palmer-Maloney (P-M) method for algal enumeration. This method is not frequently used in the United States, possibly because a commercial source for the P-M chambers is difficult to locate. The possibility of constructing plastic P-M chambers on site was explored. Includes 13 references, figure.