Exhibit 31.2

Certification of
Principal Financial OfficerPursuant to Section 302 of theSarbanes-Oxley Act of
2002

I, John E. Yetter, certify that:

1.    
I have reviewed this quarterly report on Form 10-QSB of Derma Sciences, Inc.
(the Registrant);

2.        
Based on my knowledge, this quarterly report does not contain any untrue
statement of a material fact or omit to state a material fact necessary to make
the statements made, in light of the circumstances under which such statements
were made, not misleading with respect to the period covered by this quarterly
report;

3.        
Based on my knowledge, the financial statements, and other financial information
included in this quarterly report, fairly present in all material respects the
financial condition, results of operations and cash flows of the Registrant as
of, and for, the periods presented in this quarterly report;

4.        
The Registrants other certifying officer and I are responsible for
establishing and maintaining disclosure controls and procedures (as defined in
Exchange Act Rules 13a-15(e) and 15d-15(e)) for the Registrant and have:

| | (a)
  Designed such disclosure controls and procedures, or caused
such disclosure controls and procedures to be designed under our
supervision, to ensure that material information relating to the
Registrant, including its consolidated subsidiaries, is made known to
us by others within those entities, particularly during the period in
which this report is being prepared;
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (b)
  Evaluated the effectiveness of the Registrants
disclosure controls and procedures and presented in this report our
conclusions about the effectiveness of the disclosure controls and
procedures, as of the end of the period covered by this report based
on such evaluation; and
| | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (c)
  Disclosed in this report any change in the Registrants
internal control over financial reporting (as defined in Exchange Act
Rule 13a-15(f) and 15d-15(f)) that occurred during the Registrants
most recent fiscal quarter that has materially affected, or is
reasonably likely to materially affect, the Registrants
internal control over financial reporting; and
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

5.        
The Registrants other certifying officer and I have disclosed, based on
our most recent evaluation of internal control over financial reporting, to the
Registrants auditors and the audit committee of the Registrants
board of directors (or persons performing the equivalent functions):

| | (a)
  All significant deficiencies and material weaknesses in the
design or operation of internal control over financial reporting
which are reasonably likely to adversely affect the Registrants
ability to record, process, summarize and report financial
information; and
| | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

| | (b)
  Any fraud, whether or not material, that involves management
or other employees who have a significant role in the Registrants
internal control over financial reporting.
| | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|                      |                                                                                              | 
|--------------------- | -------------------------------------------------------------------------------------------- | 
|Dated:August 14, 2007 | /s/ John E. Yetter                                                                           | 
|                      | John E. Yetter, CPA
Vice President and Chief Financial Officer
(Principal Financial Officer) |